Immigration Health Surcharge Calculator
Calculate your IHS payment before you apply
All Calculators
563 calculators across 17 categories
563 calculators found
ILR Eligibility Calculator
Find out when you qualify for Indefinite Leave to Remain
Spouse Visa Financial Requirement Calculator
Check if you meet the MFR income threshold
UK Visa Fee Calculator
Total visa costs by route and number of applicants
Student Visa Maintenance Calculator
London vs outside London funds requirement
Skilled Worker Salary Threshold Calculator
Check against 2024 going rates
Right to Work Expiry Tracker
Check when your right to work expires and when your employer must re-check
Naturalisation Fee Calculator
Calculate the cost of applying for British citizenship for adults and children
Absence Allowance Checker
Check if your time outside the UK affects your ILR or citizenship application
Overstay Risk Calculator
Understand the consequences of overstaying a UK visa and re-entry ban timelines
Graduate Visa Eligibility Checker
Check if you qualify for the UK Graduate visa after completing your degree
Priority Visa Service Cost Calculator
Calculate the additional cost of priority or super priority processing for your UK visa
Family Visa Total Cost Estimator
Calculate the total cost of bringing your family to the UK including visa fees, IHS, and related costs
Appeal and Administrative Review Fee Calculator
Calculate the cost of appealing a UK visa refusal or requesting an administrative review
Visitor Visa vs Permitted Paid Engagement Checker
Find out whether you need a standard visitor visa or can use permitted paid engagement for short work visits to the UK
Life in the UK Test Date Planner
Plan when to take the Life in the UK test based on your visa and application timeline
Business Loan Repayment Calculator
Calculate monthly repayments, total interest and true cost of a business loan
APR Calculator
Calculate the true annual percentage rate on a loan including interest, arrangement fees, insurance and mandatory charges
Take-Home Pay Calculator
Calculate your exact take-home pay after income tax, National Insurance, student loan and pension deductions
Income Tax Calculator
Calculate your income tax bill for 2025/26 across all income types
Capital Gains Tax Calculator
Calculate personal UK Capital Gains Tax on shares, property, crypto, business assets and other disposals
Inheritance Tax Calculator
Estimate UK inheritance tax using the nil-rate band, residence nil-rate band, gifts and reliefs
Student Loan Repayment Calculator
Calculate monthly student loan repayments and whether you will repay in full before write-off
Compound Interest Calculator
Calculate how your savings or investments grow with compound interest over time
Present Value Calculator
Discount future cash flows into today's money and calculate NPV for investment decisions
Inflation Calculator
Calculate inflation-adjusted values, historical UK inflation impact, and real returns
Annuity Calculator
Estimate UK retirement annuity income from a pension pot and compare annuity versus drawdown
Interest Rate Calculator
Find the interest rate earned or needed to reach a savings or investment goal
Simple Interest Calculator
Calculate simple interest on savings or loans and compare it with compound interest
Credit Card Repayment Calculator
Calculate how long to pay off your credit card and how much interest you will pay
Debt Consolidation Calculator
Calculate whether consolidating your debts into one loan saves money
Buy Now Pay Later Calculator
Calculate the true cost of buy now pay later and compare against paying upfront or using a credit card
Universal Credit Calculator
Estimate your Universal Credit entitlement based on your circumstances
Council Tax Calculator
Calculate your council tax bill and check eligibility for discounts and exemptions
Tax-Free Childcare Calculator
Calculate your Tax-Free Childcare top-up and compare against childcare vouchers
Rental Yield Calculator
Calculate gross and net rental yield on a buy-to-let property investment
Child Benefit Calculator
Calculate your child benefit entitlement and high income charge
Marriage Allowance Calculator
Calculate the tax saving from transferring part of your personal allowance to your spouse or civil partner
Personal Savings Allowance Calculator
Calculate how much savings interest you can earn tax-free and whether you owe tax on savings income
Pension Tax Relief Calculator
Calculate the true cost of pension contributions after tax relief for basic and higher rate taxpayers
Pension Annual Allowance Calculator
Calculate your pension annual allowance and check if you have exceeded it
Pension Drawdown Calculator
Calculate how long your pension pot will last in drawdown and find a sustainable withdrawal rate
State Pension Calculator
Estimate your state pension and find out when you can claim it
BMI Calculator
Calculate your body mass index using height and weight, with BMI category interpretation.
BMR Calculator
Calculate your basal metabolic rate using age, sex, height, and weight.
TDEE Calculator
Estimate your total daily energy expenditure from BMR and activity level
Calorie Calculator
Estimate daily calorie needs for maintenance, weight loss, and weight gain using BMR and activity level.
Calorie Needs Calculator
Calculate daily calorie targets for weight loss, maintenance, or weight gain.
Body Surface Area Calculator
Calculate body surface area from height and weight using common BSA formulas.
BAC Calculator
Estimate blood alcohol concentration from drinks, body weight, sex, and time elapsed.
Body Type Calculator
Estimate body type from simple body measurements and explain common somatotype categories.
Pregnancy Calculator
Estimate due date, gestational age, trimester, conception date, and days remaining in pregnancy.
Due Date Calculator
Estimate pregnancy due date from last period, conception date, IVF date, or ultrasound date.
Pregnancy Conception Calculator
Estimate possible conception date from due date, last period, or ultrasound dating.
Conception Calculator
Estimate fertile window and possible conception dates from last period, cycle length, or due date.
Ovulation Calculator
Estimate ovulation date and fertile window from last period date and cycle length.
Period Calculator
Estimate next period date, cycle dates, ovulation date, and fertile window.
Pregnancy Weight Gain Calculator
Estimate recommended pregnancy weight gain range based on pre-pregnancy BMI and pregnancy type.
Auto Loan Calculator
Calculate monthly car loan payments, total interest, and total loan cost.
Cash Back or Low Interest Calculator
Compare a cash rebate against a lower interest rate when financing a vehicle.
Auto Lease Calculator
Estimate monthly car lease payments using vehicle price, residual value, money factor, and lease term.
MPG Calculator
Calculate UK miles per gallon from miles driven and fuel used, or estimate fuel needed for a journey.
Fuel Cost Calculator
Estimate petrol or diesel costs for a journey using distance, MPG, and UK price per litre.
Fuel Savings Calculator
Compare annual fuel costs between two vehicles and estimate yearly or multi-year savings.
L/100km Calculator
Calculate fuel economy in litres per 100km and convert between L/100km and UK MPG.
Tyre Size Calculator
Calculate tyre dimensions from a tyre size code, including sidewall, diameter, and circumference.
Horsepower Calculator
Convert between horsepower, brake horsepower, kilowatts, and metric PS.
Car Depreciation Calculator
Estimate car value loss by age, vehicle type, purchase price, and mileage.
GFR Calculator
Estimate glomerular filtration rate using serum creatinine, age, and sex with the CKD-EPI 2021 equation.
Fat Intake Calculator
Calculate daily fat intake in grams based on calories and dietary fat percentage.
Protein Calculator
Calculate daily protein intake based on body weight, activity level, and fitness goal.
Carbohydrate Calculator
Calculate daily carbohydrate targets based on calories, protein, fat, and fitness goal.
Army Body Fat Calculator
Estimate body fat percentage using the U.S. Army body fat method based on circumference measurements.
Body Fat Percentage Calculator
Estimate body fat percentage using the US Navy body fat formula.
Healthy Weight Calculator
Calculate a healthy weight range for your height using the standard healthy BMI range.
Ideal Weight Calculator
Estimate ideal body weight using height and sex with the Devine formula.
Lean Body Mass Calculator
Calculate lean body mass from body weight and body fat percentage.
Macro Calculator
Calculate daily protein, carbohydrate, and fat targets based on calories, body weight, and goal.
Water Intake Calculator
Estimate daily water intake based on body weight and activity level.
One Rep Max Calculator
Estimate your one rep max using weight lifted and reps performed.
Calories Burned Calculator
Estimate calories burned during exercise using activity type, body weight, and duration.
Pace Calculator
Calculate running, walking, or cycling pace from distance and time.
Target Heart Rate Calculator
Calculate target heart rate zones for exercise using age and resting heart rate.
Calories Burned Walking Calculator
Calculate calories burned walking from weight, distance, speed, time, and approximate steps.
Calories Burned Running Calculator
Estimate calories burned running from weight, distance, pace, and MET intensity.
Calories Burned Cycling Calculator
Estimate calories burned cycling for road, mountain, hybrid, and indoor rides.
Steps to Miles Calculator
Convert steps to miles, kilometres, stride length, and estimated calories burned.
Weight Loss Calculator
Estimate daily calories, calorie deficit, and time to reach a target weight.
Ideal Body Weight Calculator
Compare ideal body weight estimates using Devine, Robinson, Miller, and BMI methods.
Waist to Hip Ratio Calculator
Calculate waist to hip ratio and compare against common adult risk categories.
Waist to Height Ratio Calculator
Calculate waist to height ratio and check whether waist is less than half height.
Child BMI Calculator
Calculate BMI for children and estimate an age-adjusted screening centile.
Running Pace Calculator
Calculate running pace, speed, and race finish times from distance and time.
Protein Intake Calculator
Estimate daily protein intake based on weight, age, activity, and nutrition goal.
Keto Calculator
Estimate ketogenic diet calories, fat, protein, and net carb macro targets.
Sleep Calculator
Find suggested bedtimes or wake times using 90-minute sleep cycle estimates.
Baby Growth Percentile Calculator
Estimate baby weight, length, and head circumference screening centiles.
Net Carb Calculator
Calculate net carbohydrates from total carbs, fibre, and sugar alcohols.
Calorie Deficit Calculator
Calculate a daily calorie deficit, target calories, and estimated time to reach a weight goal.
Rowing Calorie Calculator
Estimate calories burned on a rowing machine using body weight, workout duration, and intensity.
Swimming Calorie Calculator
Estimate calories burned swimming by body weight, duration, stroke, and distance.
Conception Date Calculator
Estimate an approximate conception date and likely conception window from due date or last period.
Food Calorie Calculator
Build a meal from common UK foods and estimate total calories, protein, carbs, and fat.
Vitamin D Calculator
Estimate vitamin D from UK sunlight exposure and compare against NHS supplement guidance.
Mortgage Repayment Calculator
Calculate monthly mortgage repayments, total interest and the impact of overpayments
Mortgage Payoff Calculator
See how extra mortgage payments reduce your term and total interest paid
Refinance Calculator
Calculate whether remortgaging to a new deal saves money after fees
Down Payment Calculator
Calculate the UK mortgage deposit you need, your LTV, and how long it will take to save
Mortgage Affordability Calculator
Calculate how much you can borrow for a mortgage based on your income and outgoings
Stamp Duty Calculator
Calculate Stamp Duty Land Tax for residential property purchases in England and Northern Ireland
Merchant Cash Advance Calculator
Calculate the true cost of a merchant cash advance and convert factor rates to APR
Invoice Finance Cost Calculator
Calculate the cost of invoice factoring and invoice discounting for your business
Business Runway Calculator
Calculate how many months of runway your business has before running out of cash
Start Up Loan Repayment Calculator
Calculate repayments on a government-backed UK Start Up Loan
Business Loan Eligibility Checker
Check whether your business is likely to qualify for a UK business loan
Cash Flow Gap Calculator
Calculate the funding gap caused by the difference between paying suppliers and receiving payment from customers
Working Capital Calculator
Calculate your working capital ratio and assess your business liquidity
Late Payment Interest Calculator
Calculate statutory interest and compensation on late payments from UK business customers
R&D Tax Credit Calculator
Estimate your R&D tax credit claim under the UK SME and RDEC schemes
Break-Even Calculator
Calculate your break-even point in units and revenue for your business
VAT Calculator
Add or remove VAT from any amount. Covers standard, reduced and flat rate schemes.
Dividend vs Salary Calculator
Find the most tax-efficient way to pay yourself from your limited company
Corporation Tax Calculator
Calculate your UK corporation tax liability including marginal relief
Employer NI Cost Calculator
Calculate the true employment cost including employer National Insurance and pension contributions
IR35 Status Indicator
Assess whether your contract is likely inside or outside IR35
Profit Margin Calculator
Calculate gross, operating and net profit margins for your business
Unit Economics Calculator
Calculate CAC, LTV, payback period and LTV:CAC ratio for your business
Equity Dilution Calculator
Calculate how much your shareholding is diluted by a funding round
SEIS / EIS Tax Relief Calculator
Calculate the tax relief available to investors under the SEIS and EIS schemes
Statutory Sick Pay Calculator
Calculate SSP entitlement and cost for employees off sick
Debt Service Coverage Ratio Calculator
Calculate your DSCR to assess whether your business can afford new debt
Loan vs Equity Calculator
Compare the true cost of debt financing against giving up equity in your business
Early Repayment Cost Calculator
Calculate the penalty and true saving from repaying a business loan early
Bridging Loan Cost Calculator
Calculate the total cost of a bridging loan including monthly interest and arrangement fees
Asset Finance Calculator
Compare hire purchase and finance leasing costs for business assets
Apprenticeship Levy Calculator
Calculate your apprenticeship levy contribution and available training fund
Maternity and Paternity Pay Calculator
Calculate statutory maternity, paternity, and shared parental pay for employers and employees
Pricing Calculator
Calculate selling price from cost using markup or margin. Convert between markup and margin instantly.
Churn and Revenue Impact Calculator
Calculate customer lifetime value and the revenue impact of reducing churn for subscription businesses
Business Capital Gains Tax Calculator
Calculate CGT on business asset disposals including Business Asset Disposal Relief (formerly Entrepreneurs Relief)
Commercial Property Stamp Duty Calculator
Calculate Stamp Duty Land Tax on commercial property purchases in England
Business Lease Cost Calculator
Calculate the total cost of a commercial property lease including rent-free periods and rent reviews
Business Rates Relief Calculator
Estimate business rates, small business rate relief, and retail, hospitality and leisure multiplier savings in England
Founder Salary Affordability Calculator
Calculate how much salary you can afford to pay yourself as a founder without harming your business
Hours Calculator
Calculate the duration between start and end times with optional break deduction
Weekly Hours Calculator
Calculate total hours worked across a full week for timesheets, payroll and shift work
Age Calculator
Calculate exact age from date of birth in years, months, days, weeks and total days
Hours and Minutes Calculator
Add, subtract, and convert hours and minutes for timesheets, payroll, study time and project tracking
Time Zone Calculator
Convert a date and time from one time zone to another with daylight saving time support
Business Days Calculator
Calculate business days between two dates, excluding weekends and optional holidays
Countdown Timer
Count down to a specific date and time for events, deadlines, launches and reminders
Stopwatch Lap Time Calculator
Measure elapsed time with start, pause, resume, reset and lap tracking
Date Add / Subtract Calculator
Add or subtract years, months, weeks, or days from a given date
Day of the Week Calculator
Determine the day of the week for any given date
Time Units Converter
Convert between seconds, minutes, hours, days and weeks
Time Converter
Convert seconds, minutes, hours, days, weeks, months and years instantly
Hours to Minutes Calculator
Convert hours and extra minutes into total minutes for timesheets, study logs and schedules
Minutes to Hours Calculator
Convert minutes into decimal hours and hours-plus-minutes format
Seconds to Minutes Calculator
Convert seconds into minutes, remaining seconds, decimal minutes and decimal hours
Days to Weeks Calculator
Convert days to weeks and remaining days, or weeks back into days
Time Difference Calculator
Calculate the time between two clock times, including overnight periods and break deductions
What Time Will It Be Calculator
Add or subtract hours and minutes from a start time and handle midnight rollover
Sleep Time Calculator
Estimate sleep duration and bedtime or wake time ranges from age-based sleep recommendations
Pay Raise Calculator
Calculate a new salary after a pay raise and compare annual, monthly and weekly gross pay
Days Until Calculator
Calculate calendar days, weeks, and remaining days until a future date
Time Until Calculator
Calculate the time remaining until a future date and clock time
Timer
Build a timer duration from hours, minutes, and seconds with total seconds and minutes
Age Difference Calculator
Calculate the age gap between two dates of birth in years, months, days, and total days
Days Since Date Calculator
Calculate how many calendar days have passed since a selected date
Download Time Calculator
Estimate download time from file size and internet speed
Leap Year Calculator
Check whether a year is a leap year and see how many days it contains
Weeks Between Dates Calculator
Calculate weeks, remaining days, decimal weeks, and total days between two dates
Years Between Dates Calculator
Calculate calendar years, months, days, decimal years, and total days between two dates
Decimal Hours to Time Calculator
Convert decimal hours into HH:MM:SS time format
Minutes to Time Calculator
Convert minutes into HH:MM:SS time format
Seconds to Time Calculator
Convert seconds into HH:MM:SS time format
Time to Decimal Hours Calculator
Convert hours, minutes, and seconds into decimal hours
Time to Seconds Calculator
Convert hours, minutes, and seconds into total seconds
Military Time Converter
Convert between 12-hour AM/PM time and 24-hour military time
Sunrise Sunset Calculator
Calculate sunrise, sunset and day length for a location and date
Energy Bill Calculator
Calculate your estimated gas and electricity bill based on your usage and current rates
Electricity Cost Calculator
Calculate UK appliance electricity running cost from watts, kWh, usage time and unit rate
Solar Panel Payback Calculator
Calculate how long solar panels take to pay back their cost and your lifetime savings
EV vs Petrol Cost Calculator
Compare the true running cost of an electric vehicle against a petrol or diesel car
Home Energy Audit Calculator
Identify where your home loses energy and calculate the savings from common improvements
Business Energy Cost Calculator
Estimate UK business electricity and gas costs from kWh usage, unit rates and standing charges
Business Carbon Footprint Calculator
Calculate your business carbon footprint from energy, travel, and operations
Energy Direct Debit Calculator
Check if your energy direct debit is correct and calculate the right amount to avoid debt or credit
Smart Meter Savings Calculator
Calculate how much you could save by switching to a smart meter and time-of-use tariff
Water Meter Calculator
Find out whether a water meter would save you money compared to unmetered charges
Boiler Replacement Payback Calculator
Calculate how long a new boiler takes to pay back through energy savings
Battery Storage Payback Calculator
Calculate how long a home battery storage system takes to pay back and your lifetime savings
Wind Turbine Payback Calculator
Calculate the payback period and lifetime savings of a small domestic wind turbine
EV Charging Cost Calculator
Calculate the cost of charging your electric vehicle at home, at work, and at public chargers
EV Battery Degradation Calculator
Calculate how much your EV battery will degrade over time and its impact on range and resale value
Insulation Savings Calculator
Calculate the annual savings and payback period from adding or improving insulation in your home
Double Glazing Payback Calculator
Calculate the payback period and annual savings from upgrading to double or triple glazing
Smart Thermostat Savings Calculator
Calculate your annual savings from installing a smart thermostat
LED Lighting Savings Calculator
Calculate your annual savings from switching to LED bulbs
Water Usage Calculator
Calculate your household daily water usage and compare against the UK average
Solar ROI Calculator
Calculate solar panel return on investment, annualised returns, and 25-year profit
EV Range Calculator
Estimate electric vehicle range after temperature, motorway driving, and charge level adjustments
Energy Bill Gas and Standing Charge Calculator
Calculate gas-only energy costs and see how standing charges affect your annual bill
Redundancy Pay Calculator
Calculate your statutory redundancy pay entitlement based on your age, salary and length of service
Holiday Entitlement Calculator
Calculate your statutory annual leave entitlement including bank holidays
Notice Period Calculator
Calculate your statutory and contractual notice period and payment in lieu of notice
Small Claims Court Calculator
Calculate court fees, interest, and total claim amount for small claims in England and Wales
Unfair Dismissal Compensation Calculator
Estimate compensation for unfair dismissal including basic and compensatory awards
30-Day Right to Reject Calculator
Check if you are within the 30-day right to reject a faulty product and get a full refund
Rental Deposit Dispute Calculator
Calculate fair deductions from your rental deposit and dispute unfair landlord charges
Section 21 Notice Checker
Check whether a Section 21 notice is valid and when you must leave
Package Holiday Compensation Calculator
Calculate compensation for a ruined or cancelled package holiday
Overtime Pay Calculator
Calculate your overtime pay and check if your employer is paying you correctly for extra hours
Zero Hours Contract Rights Checker
Check zero hours contract pay, holiday entitlement, minimum wage and work-rights scenarios
Court Interest on Judgments Calculator
Calculate the statutory interest accruing on an unpaid County Court Judgment
Limitation Period Calculator
Check if your legal claim is still within the time limit
Chargeback Eligibility Checker
Check if you can get a refund through chargeback or Section 75 on your credit or debit card
HMO Licence Checker
Check if your property requires an HMO licence and what the penalties are for non-compliance
Rent Increase Notice Calculator
Check if your rent increase notice is valid and calculate the correct notice period
Statutory Demand Checker
Check if a debt qualifies for a statutory demand and understand the insolvency implications
Tenant Rights Checker
Check your key rights as a tenant including repairs, deposits, eviction, and rent increases
TUPE Transfer Rights Checker
Check your employment rights when your employer changes due to a business transfer or outsourcing
Crypto CGT Calculator
Calculate UK Capital Gains Tax on cryptocurrency disposals including the 30-day same-day rule
Crypto Income Tax Calculator
Calculate UK income tax on crypto received through mining, staking, airdrops, and referral rewards
Crypto Profit and Loss Calculator
Calculate profit or loss on cryptocurrency trades including exchange fees
Crypto DCA Calculator
Calculate the returns from dollar cost averaging into Bitcoin or any cryptocurrency
Crypto Break-Even Calculator
Calculate the price at which your crypto investment breaks even including all fees
Liquidation Price Calculator
Calculate the liquidation price for leveraged crypto positions on futures and margin trading
Staking Rewards Calculator
Calculate your cryptocurrency staking rewards and annual percentage yield
Crypto Mining Profitability Calculator
Calculate the profitability of cryptocurrency mining based on your hardware and electricity costs
Crypto Tax Loss Harvesting Calculator
Calculate tax savings from harvesting crypto losses to offset capital gains
Bitcoin vs S&P 500 Calculator
Compare returns from investing in Bitcoin against the S&P 500 over any time period
Crypto Portfolio Rebalancing Calculator
Calculate how to rebalance your cryptocurrency portfolio back to your target allocation
Monthly Budget Calculator
Plan monthly income, spending, savings, debt payments, and 50/30/20 budget balance
Emergency Fund Calculator
Estimate your emergency fund target from essential expenses, savings, and target months
Sinking Fund Calculator
Calculate monthly savings needed for planned future expenses and multiple savings goals
Cost of Living Calculator
Compare estimated living costs between UK cities using broad city cost indices
Inheritance Split Calculator
Estimate how an estate could be split after tax, debts, fixed gifts, percentages, and equal shares
Gift Tax Calculator
Estimate UK inheritance tax exposure on lifetime gifts using exemptions and the 7-year rule
Salary Sacrifice Calculator
Estimate pension salary sacrifice and Cycle to Work take-home pay impact
Stamp Duty Investment Property Calculator
Estimate SDLT for second homes, buy-to-let purchases, and additional residential properties
FIRE Number Calculator
Calculate your financial independence number and see when you could retire early
Safe Withdrawal Rate Calculator
Calculate how much you can withdraw from your portfolio each year in retirement
Coast FIRE Calculator
Calculate when your investments can grow to your FIRE number without further contributions
Net Worth Calculator
Calculate your net worth, liquid net worth, investable assets, and FIRE progress
Savings Rate Calculator
Calculate your savings rate and estimate how long it could take to reach FIRE
Financial Independence Age Calculator
Calculate the age when you could reach financial independence based on savings, expenses, and investment returns
University Total Cost Calculator
Calculate the true total cost of a UK university degree including tuition, maintenance loans, interest, and living costs
Student Maintenance Loan Eligibility Calculator
Estimate your Student Finance England maintenance loan and likely living cost shortfall
Graduate Salary vs Apprenticeship Calculator
Compare the long-term financial outcome of university against a degree apprenticeship or school leaver route
Private School Fee Calculator
Estimate UK private school fees, VAT-era cost, extras, bursaries and total education cost
University ROI Calculator
Calculate the financial return on investment from a university degree compared with going straight into work
Postgraduate Loan Calculator
Calculate postgraduate student loan repayments, combined undergraduate loan deductions, and 30-year write-off projection
Student Budget Calculator
Build a practical monthly student budget and see whether your maintenance loan covers real living costs
Triangle Calculator
Solve any triangle using SSS, SAS, ASA, AAS, SSA, right triangle, and Pythagorean theorem modes
Area Calculator
Calculate the area of common 2D shapes with formula substitutions and unit conversions
Volume Calculator
Calculate volume for common 3D shapes with formulas, cubic units and litre conversions
Circle Calculator
Calculate radius, diameter, circumference, area, arc length, sector area, chord length, and segment area
Distance Calculator
Calculate the distance and midpoint between two points in 2D or 3D space with step-by-step working
Slope Calculator
Calculate slope between two points, convert linear equations, and find parallel or perpendicular lines
Surface Area Calculator
Calculate the total surface area of common 3D shapes with component breakdowns and step-by-step working
Percentage Calculator
Calculate percentages five ways including percentage of, percentage change, difference, and add or subtract a percentage
Exponent and Root Calculator
Calculate exponents, powers, roots, and scientific notation with step-by-step working
Quadratic Formula Calculator
Solve quadratic equations with the quadratic formula, discriminant, complex roots, and vertex form
Logarithm Calculator
Calculate logarithms with any base, natural logs, and logarithm equations with step-by-step working
Ratio Calculator
Simplify ratios, scale ratios, divide totals into ratios, and convert ratios to fractions and percentages
Binary Calculator
Calculate binary arithmetic, convert between binary decimal hex and octal, and perform bitwise operations
Hex Calculator
Calculate hexadecimal arithmetic, base conversions, and web color codes
Matrix Calculator
Add, subtract, multiply, invert, transpose matrices and solve systems of equations
LCM and GCF Calculator
Calculate the Least Common Multiple and Greatest Common Factor with step-by-step working
Factor Calculator
Find all factors of any number with prime factorisation, factor pairs, and step-by-step working
Rounding Calculator
Round numbers to decimal places, nearest values, significant figures, or truncate without rounding
Scientific Calculator
A fast browser scientific calculator with trigonometry, logarithms, powers, roots, memory, and keyboard support
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic in scientific notation
Modulo Calculator
Calculate modulo, remainders, Euclidean division, and practical modular arithmetic examples
Random Number Generator
Generate random integers, decimals, list picks, and unique number sets instantly
Percent Error Calculator
Calculate percent error between measured and actual values with step-by-step working
Half-Life Calculator
Calculate radioactive decay, half-life, and time elapsed with carbon dating examples
Mean, Median, Mode and Range Calculator
Calculate mean, median, mode, range, quartiles, variance, and standard deviation from any dataset
Standard Deviation Calculator
Calculate population and sample standard deviation and variance with full step-by-step working
Probability Calculator
Calculate basic probability, combined events, conditional probability, and binomial probability
Sample Size Calculator
Calculate the sample size needed for statistically valid survey and research results
Z-Score Calculator
Calculate z-scores, percentile ranks, and standard normal distribution probabilities
Confidence Interval Calculator
Calculate confidence intervals for population mean and proportion with z-interval and t-interval working
Variance Calculator
Calculate population and sample variance from a dataset with mean and standard deviation
Combinations Calculator
Calculate nCr combinations for selections where order does not matter
Permutations Calculator
Calculate nPr permutations for ordered arrangements and selections
Factorial Calculator
Calculate n factorial for whole numbers and combinatorics problems
Hypothesis Test Calculator
Estimate z-test and t-test statistics, p-values, and degrees of freedom
Correlation Calculator
Calculate Pearson correlation coefficient for paired x and y data
Linear Regression Calculator
Calculate least-squares regression line, slope, intercept, r, and R squared
Percentile Calculator
Find percentile values and percentile rank from sorted or unsorted data
Box Plot Calculator
Calculate five-number summary, quartiles, IQR, fences, and outliers
Frequency Distribution Calculator
Group data into class intervals and calculate frequency and relative frequency
IQR Calculator
Calculate interquartile range, quartiles, outlier fences, and outliers
Normal Distribution Calculator
Calculate normal distribution probabilities using mean and standard deviation
T-Distribution Calculator
Calculate Student t-distribution probabilities and two-tailed p-values
Chi-Square Calculator
Calculate chi-square statistic, degrees of freedom, and p-value from observed and expected counts
Permutation and Combination Calculator
Calculate permutations, combinations, and factorials with step-by-step working
Number Sequence Calculator
Calculate arithmetic, geometric, and Fibonacci sequences and identify unknown sequence patterns
Slope and Y-Intercept Calculator
Calculate slope, y-intercept, x-intercept, midpoint, distance, and line equations
Midpoint Calculator
Find the midpoint and distance between two coordinate points in 2D or 3D
Point-Slope Form Calculator
Find the equation of a line from one point and a slope
Standard Form Linear Equation Calculator
Convert linear equations between standard, slope-intercept, and point-slope form
X and Y Intercepts Calculator
Find x-intercept and y-intercept points for a linear equation
Parallel Line Calculator
Find the equation of a parallel line through a given point
Perpendicular Line Calculator
Find the equation of a perpendicular line through a given point
Line Through Two Points Calculator
Find the equation of a line through two coordinate points with all common forms
Line Intersection Calculator
Find where two linear equations intersect and identify parallel or identical lines
Gradient Calculator
Calculate gradient between two points using UK GCSE rise over run terminology
Rate of Change Calculator
Calculate average rate of change between two points or values
Circle Equation Calculator
Convert circle equations between standard and general form
Quadratic Function Calculator
Analyse quadratic functions, vertex, roots, axis, range, and direction
Arithmetic Sequence Calculator
Calculate arithmetic sequence nth term, common difference, and sum
Geometric Sequence Calculator
Calculate geometric sequence nth term, common ratio, finite sum, and infinite sum
Absolute Value Calculator
Calculate absolute value and solve simple absolute value equations
Logarithm Calculator
Calculate logarithms in base 10, natural log, base 2, or any custom base
Square Root Calculator
Calculate square roots, cube roots, nth roots, and simplified square root form
Cube Root Calculator
Calculate cube roots for positive and negative real numbers
Fraction Exponent Calculator
Calculate fractional exponents using roots and powers
Order of Operations Calculator
Solve arithmetic expressions using BODMAS/BIDMAS order of operations
Inequality Calculator
Solve simple linear inequalities and show interval notation
Simultaneous Equations Calculator
Solve two-variable simultaneous equations using determinant and elimination logic
Fibonacci Calculator
Find Fibonacci numbers, generate the sequence, and compare the golden ratio trend
Prime Number Calculator
Check whether a number is prime, find prime factors, and generate primes
Scientific Calculator Online
Use a full online scientific calculator with trig, logs, powers, roots, and constants
CM to Inches Converter
Convert centimetres to inches instantly with formula and reference table
Inches to CM Converter
Convert inches to centimetres instantly with formula and reference table
Feet to Metres Converter
Convert feet to metres instantly using UK spelling and formula
Metres to Feet Converter
Convert metres to feet instantly with formula and reference table
Miles to KM Converter
Convert miles to kilometres instantly with common distance examples
KM to Miles Converter
Convert kilometres to miles instantly with race distance examples
KG to LBS Converter
Convert kilograms to pounds instantly for weight and luggage checks
LBS to KG Converter
Convert pounds to kilograms instantly with formula and table
Stones to KG Converter
Convert UK body weight in stones and pounds to kilograms
KG to Stones Converter
Convert kilograms to UK stones and pounds instantly
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit with temperature and gas mark references
Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius with common temperature references
Litres to Gallons Converter
Convert litres to UK imperial and US gallons
Gallons to Litres Converter
Convert UK imperial or US gallons to litres
ML to FL OZ Converter
Convert millilitres to UK and US fluid ounces
MPH to KPH Converter
Convert miles per hour to kilometres per hour instantly
KPH to MPH Converter
Convert kilometres per hour to miles per hour instantly
Square Feet to Square Metres Converter
Convert square feet to square metres for UK property and flooring
Acres to Hectares Converter
Convert acres to hectares for land and property measurements
MM to Inches Converter
Convert millimetres to decimal inches with fraction guidance
Grams to Ounces Converter
Convert grams to ounces instantly for cooking and parcels
Ounces to Grams Converter
Convert ounces to grams instantly for recipes and weights
Yards to Metres Converter
Convert yards to metres for sport, distance, and property use
Stones to Pounds Converter
Convert stones to pounds instantly for UK body weight
Feet and Inches to CM Converter
Convert feet and inches to centimetres for height conversions
MPG to L/100km Converter
Convert UK MPG, US MPG, and litres per 100km for fuel economy comparisons
Torque Converter
Convert torque between Newton metres, foot pounds, inch pounds, and kilogram metres
Energy Converter
Convert energy units including joules, kWh, food calories, BTU, and electronvolts
Pressure Converter
Convert pressure units including bar, PSI, pascals, atmospheres, and mmHg
Frequency Converter
Convert frequency units including Hz, kHz, MHz, GHz, THz, RPM, and period
Angle Converter
Convert angles between degrees, radians, gradians, turns, arcminutes, arcseconds, and milliradians
Fuel Economy Converter
Convert fuel economy between UK MPG, US MPG, L/100km, km/L, and miles per litre
Baking Ingredient Converter
Convert baking ingredients between grams, cups, tablespoons, teaspoons, ounces, and ml
EV Efficiency Converter
Convert EV efficiency between miles per kWh, kWh per 100km, kWh per 100 miles, and MPGe
Force Converter
Convert force units including newtons, kilonewtons, pounds-force, kilogram-force, dynes, and poundals
Capacitance Converter
Convert capacitance units including farads, millifarads, microfarads, nanofarads, and picofarads
Resistance Converter
Convert resistance units and decode 4-band resistor colour codes
Paint Calculator
Calculate how many litres of paint you need for walls, ceilings, rooms, and single walls
Wallpaper Calculator
Calculate how many wallpaper rolls you need using UK standard roll sizes
Flooring Calculator
Calculate flooring area, waste allowance, packs, and estimated cost in m²
Carpet Calculator
Calculate carpet to order from UK 4m or 5m roll widths with fitting allowance
Tile Calculator
Calculate floor or wall tiles, grout gap, waste allowance, and packs needed
Decking Calculator
Calculate decking boards, waste allowance, and linear metres for UK deck projects
Fence Panel Calculator
Calculate fence panels, posts, post holes, and postcrete bags for UK fencing
Gravel Calculator
Calculate gravel, soil, sand, or aggregate volume, tonnes, bulk bags, and small bags
Concrete Calculator
Calculate concrete volume and 25kg or 40kg bags for slabs, paths, post holes, and footings
Roof Pitch Calculator
Calculate roof pitch, angle, slope ratio, rafter length, and roof multiplier
Board and Batten Calculator
Estimate battens, spacing, total board length, and waste for board and batten walls
Board Foot Calculator
Calculate board feet from timber thickness, width, length, and quantity, with metric volume conversions
Plywood Calculator
Estimate plywood sheet quantities, weight, and cost from project area, sheet size, and waste allowance
Stud Wall Framing Calculator
Estimate studs, plates, noggins, and timber length for an internal stud wall
Rafter Length Calculator
Calculate rafter length from span, rise, pitch angle, and overhang
Trim and Moulding Calculator
Calculate skirting board, architrave, coving, and picture rail lengths for a room
Concrete Footing Calculator
Calculate concrete volume for strip footings, trench fill, and foundation runs
Post Hole Concrete Calculator
Estimate concrete for fence posts, deck posts, and round post holes
Concrete Block Calculator
Estimate concrete blocks needed for a wall from dimensions, block size, and waste
Block Mortar Calculator
Estimate mortar volume and bag quantities for block or brick work
Concrete Steps Calculator
Estimate concrete volume for straight concrete steps from rise, tread, width, and step count
Rebar Material Calculator
Estimate reinforcing bar counts and total length for slabs, footings, and grids
Deck Board Calculator
Estimate deck boards from deck size, board width, gap, board length, and waste
Baluster Spacing Calculator
Calculate baluster count and even spacing for deck railings and stair guards
Paver Calculator
Estimate paving slabs or block pavers from patio area, paver size, and waste
Paver Base Calculator
Estimate sub-base, bedding sand, and compacted base volume for paving
Asphalt Calculator
Estimate asphalt volume and tonnes from driveway area, depth, density, and waste
Asphalt Sealer Calculator
Estimate driveway sealer litres from surface area, coats, coverage, and waste
Mulch Calculator
Estimate mulch volume, litres, cubic metres, and bags for garden beds
Soil Calculator
Estimate topsoil or compost volume in cubic metres, litres, bags, or bulk bags
Sand Calculator
Estimate sand volume and tonnes for bedding, paving, play areas, and landscaping
Stone Calculator
Estimate decorative stone, aggregate, or chippings volume and tonnes
River Rock Calculator
Estimate river rock or decorative pebble volume, weight, and bags for landscaping
Grass Seed Calculator
Estimate grass seed quantity from lawn area, sowing rate, reseeding rate, and waste
Turf Calculator
Estimate turf rolls needed for a lawn from area, roll coverage, and waste allowance
Retaining Wall Calculator
Estimate retaining wall blocks, backfill, cap blocks, and waste allowance
Pool Volume Calculator
Calculate swimming pool volume in litres, cubic metres, UK gallons, and fill time
Acreage Calculator
Calculate land area in acres, hectares, square metres, square feet, and square yards
Landscape Grade Calculator
Calculate slope grade, angle, ratio, and fall for drainage, paths, ramps, and landscaping
Plant Spacing Calculator
Estimate how many plants you need from bed area, plant spacing, and planting pattern
Lawn Mowing Time Calculator
Estimate how long it takes to mow a lawn from lawn size, mower width, speed, and overlap
Raised Garden Bed Calculator
Calculate soil, compost, drainage material, and timber for raised garden beds
Roofing Material Calculator
Estimate roof covering area, bundles or sheets, underlay, and waste allowance
Roof Area Calculator
Calculate sloped roof area from footprint dimensions, pitch, and roof faces
Plasterboard Calculator
Estimate plasterboard sheets from wall or ceiling area, sheet size, openings, and waste
Brick Calculator
Estimate bricks needed for walls from wall area, brick size, mortar joints, and waste
Timber Calculator
Calculate timber for stud walls, floor joists, and roof rafters using UK metric spacing
Insulation Calculator
Calculate loft, wall, or floor insulation rolls from area, coverage, and waste allowance
Staircase Calculator
Calculate number of steps, rise, going, pitch, and basic UK stair compliance checks
Block Paving Calculator
Calculate block paving quantities, sharp sand bed volume, and waste allowance
Drainage Calculator
Estimate rainwater runoff flow rate from area, rainfall intensity, and surface type
Shed Base Calculator
Calculate concrete volume, bag quantities, or paving slabs for a shed base
Loft Conversion Calculator
Check loft conversion suitability using headroom, roof pitch, usable width, and usable floor area
Kitchen Renovation Cost Calculator
Estimate UK kitchen renovation budget by room size, quality, location, extras, and contingency
Bathroom Renovation Cost Calculator
Estimate UK bathroom renovation costs by size, finish quality, location, extras, and contingency
House Extension Cost Calculator
Estimate UK house extension build cost by size, quality, location, extras, and contingency
Square Footage Calculator
Calculate square feet from room length and width, or convert from square metres
Cubic Feet Calculator
Calculate cubic feet from length, width, and height for storage, shipping, and volume estimates
Cubic Yards Calculator
Calculate cubic yards for soil, mulch, aggregates, concrete, and landscaping materials
Cubic Metres Calculator
Calculate cubic metres from metric dimensions for concrete, soil, skips, tanks, and material volumes
Square Metres Calculator
Calculate square metres from metric dimensions for rooms, walls, floors, gardens, and materials
Square Yards Calculator
Calculate square yards for carpets, fabric, turf, and surface measurements
Tank Volume Calculator
Calculate rectangular or cylindrical tank capacity in litres, cubic metres, UK gallons, and US gallons
Scale Drawing Calculator
Convert between scale drawing measurements and real-world dimensions using ratio scales
Feet and Inches Calculator
Add, subtract, multiply, or divide feet and inches measurements for construction and DIY work
Linear Feet Calculator
Calculate total linear feet for boards, trim, fencing, shelving, and repeated lengths
Boiler Size Calculator
Estimate UK boiler size from property type, bedrooms, bathrooms, radiators, and insulation level
Radiator BTU Calculator
Calculate radiator BTU and watt output needed from room size, insulation, glazing, and target temperature
Pipe Volume Calculator
Calculate water volume in pipe runs and heating systems for planning and inhibitor dosing
Flow Rate Calculator
Calculate water flow rate from collected volume and time or from pipe diameter and velocity
Underfloor Heating Calculator
Estimate electric or wet underfloor heating output, pipe length, coverage, and running costs
TV Size Calculator
Calculate the recommended TV size from viewing distance or the ideal distance for an existing TV
TV Dimensions Calculator
Calculate TV width, height, screen area, and approximate bezel dimensions from diagonal size
Aspect Ratio Calculator
Calculate image and video aspect ratios, scale dimensions, and fit media to a container
Screen Resolution Calculator
Calculate PPI, pixel density, megapixels, and screen sharpness from size and resolution
Projector Screen Size Calculator
Calculate projector screen size from throw distance or room distance from screen size
Dog Age Calculator
Convert dog age to human years using size-based ageing estimates
Cat Age Calculator
Convert cat age to human years using International Cat Care life stage guidance
Dog Food Portion Calculator
Estimate daily dog calories, food grams, meal portions, and monthly food cost
Cat Food Portion Calculator
Estimate daily cat calories, food grams, meal portions, and monthly food cost
Pet Medicine Dose Calculator
Reference-only dog and cat medicine dose calculator with prominent vet disclaimer
Dog Healthy Weight Calculator
Compare current dog weight with breed or size healthy weight ranges and BCS guidance
Speed Calculator
Calculate speed, distance, or time with metric, imperial, and common transport units
Density Calculator
Calculate density, mass, or volume with common material density references
Ohm's Law Calculator
Calculate voltage, current, resistance, and power from any two electrical values
Force Calculator
Calculate force, mass, or acceleration using Newton's second law
Pressure Calculator
Calculate pressure, force, or area and convert between Pa, bar, psi, and atm
Kinetic Energy Calculator
Calculate kinetic energy, mass, or velocity using KE = 1/2mv2
Power Calculator
Calculate power, energy, or time and convert between watts, kilowatts, and horsepower
pH Calculator
Calculate pH, hydrogen ion concentration, pOH, and acidity or alkalinity
Molarity Calculator
Calculate molarity, moles, volume, or moles from mass and molar mass for chemistry solutions.
Molecular Weight Calculator
Calculate molecular weight and molar mass from chemical formulas, including bracketed groups.
Ideal Gas Law Calculator
Calculate pressure, volume, temperature, or moles using the ideal gas law PV=nRT.
Boyle's Law Calculator
Calculate final pressure or volume using Boyle's law at constant temperature.
Percent Concentration Calculator
Calculate percent concentration for w/v, w/w, and v/v solution calculations.
Projectile Motion Calculator
Calculate projectile range, maximum height, time of flight, and velocity components.
Momentum Calculator
Calculate momentum, mass, velocity, and impulse from force and time.
Acceleration Calculator
Calculate acceleration, velocity change, g-force, and displacement using basic SUVAT relationships.
Gravitational Force Calculator
Calculate gravitational force between two masses using Newton law of gravitation.
Wave Speed Calculator
Calculate wave speed, frequency, or wavelength using v = f lambda.
Watts to Amps Calculator
Convert watts to amps for DC, single-phase AC, and three-phase AC circuits.
Amps to Watts Calculator
Convert amps to watts and kilowatts for DC and AC circuits.
Watts to kWh Calculator
Convert watts and running time into kWh usage and estimated electricity cost.
kWh to Watts Calculator
Convert kilowatt hours and time into an average power rating in watts.
kW to kWh Calculator
Convert kilowatts and running time into kilowatt hours and estimated cost.
kWh to kW Calculator
Convert kilowatt hours and time into average kilowatts and watts.
Volts to Watts Calculator
Calculate watts from voltage, current, and optional AC power factor.
Watts to Volts Calculator
Calculate volts from watts, current, and optional AC power factor.
Amps to Volts Calculator
Convert amps to volts using resistance or power with Ohm's law.
Volts to Amps Calculator
Convert volts to amps using resistance or power with Ohm's law.
Wh to mAh Calculator
Convert watt hours to milliamp hours for batteries, power banks, and electronics.
mAh to Wh Calculator
Convert milliamp hours to watt hours for batteries and airline capacity checks.
Voltage Drop Calculator
Estimate voltage drop in copper cables and compare against common UK guide limits.
Wire Size Calculator
Estimate UK cable size from design current, circuit length, and voltage drop guide limits.
Series Resistor Calculator
Calculate total resistance for up to 10 resistors connected in series.
Parallel Resistor Calculator
Calculate total resistance for up to 10 resistors connected in parallel.
LED Resistor Calculator
Calculate LED series resistor value, nearest E24 resistor, and power rating.
Electricity Cost Calculator (kWh)
Calculate electricity cost from meter readings, kWh usage, unit rate, standing charge, and VAT.
Fraction Calculator
Add, subtract, multiply, and divide fractions with full step-by-step working
Simplify Fractions Calculator
Reduce fractions to lowest terms using the greatest common factor method
Mixed Number Calculator
Add, subtract, multiply, and divide mixed numbers with step-by-step working
Decimal to Fraction Calculator
Convert terminating and simple repeating decimals to fractions in simplest form
Fraction to Decimal Calculator
Convert fractions to decimals and identify terminating or repeating results
Fraction to Percent Calculator
Convert fractions to percentages with divide-and-multiply working
Adding Fractions Calculator
Add two or more fractions using the least common denominator method
Subtracting Fractions Calculator
Subtract fractions using common denominators and simplification steps
Improper Fraction to Mixed Number
Convert improper fractions to mixed numbers and mixed numbers to improper fractions
Equivalent Fractions Calculator
Find equivalent fractions or check whether two fractions are equivalent
LCD Calculator
Find the least common denominator for two or more fractions
Fraction to Ratio Calculator
Convert a fraction into part-to-whole and part-to-remainder ratios
Comparing Fractions Calculator
Compare, rank, and order fractions from least to greatest or greatest to least
Solve for Unknown Fraction
Solve fraction equations with an unknown using cross multiplication
Mixed Number to Improper Fraction
Convert mixed numbers to improper fractions with step-by-step working
Percent to Fraction Calculator
Convert percentages to simplified fractions with full working
Percent Change Calculator
Calculate percentage change between two values and identify increase or decrease
Percent Increase Calculator
Calculate percentage increase or find the new value after an increase
Percent Decrease Calculator
Calculate percentage decrease or find the new value after a decrease
Percent Difference Calculator
Calculate the percentage difference between two numbers using their average
Percent of a Percent Calculator
Calculate one percentage of another percentage and the combined percentage
Percent to Decimal Calculator
Convert percentages to decimals by dividing by 100 with step-by-step working
Decimal to Percent Calculator
Convert decimals to percentages by multiplying by 100 with step-by-step working
Percent to Total Calculator
Find the total when you know a part and the percentage it represents
Percent to Ratio Calculator
Convert a percentage to part-to-whole and part-to-remainder ratios
Marks Percentage Calculator
Calculate percentage score from marks obtained and total marks across one or more subjects
Grade Calculator
Calculate UK GCSE, A-Level, and university grades from weighted assessments
Test Grade Calculator
Convert test marks to a UK-style GCSE, A-Level, or university grade estimate
Weighted Grade Calculator
Calculate weighted average grades from assessments with different weights
Final Grade Calculator
Calculate what score you need in a final exam to reach a target overall grade
Degree Classification Calculator
Calculate UK degree classification from module marks, credits, and year weighting
UCAS Tariff Points Calculator
Calculate UCAS tariff points from A-Levels, AS-Levels, BTECs, T-Levels, and EPQ grades
Semester Grade Calculator
Calculate semester average, completed credits, and degree classification guide from module marks
GCSE Grade Calculator
Estimate GCSE 9-1 grades from component marks using approximate UK grade boundaries
A-Level Grade Calculator
Estimate A-Level grades from component marks using approximate A*-E boundaries
Percentage to Grade Calculator
Convert a percentage mark to GCSE, A-Level, degree, or KS2 grade guide
Marks Needed Calculator
Calculate the marks or percentage needed on remaining assessments to reach a target grade
Trigonometry Calculator
Calculate sine, cosine, tangent, and inverse trig values in degrees or radians
SOHCAHTOA Calculator
Find missing sides or angles in right triangles using sine, cosine, and tangent
Sine Calculator
Calculate the sine of an angle in degrees or radians with common trig values
Cosine Calculator
Calculate the cosine of an angle in degrees or radians with sine and tangent context
Tangent Calculator
Calculate tangent values in degrees or radians and identify undefined tangent angles
Inverse Trig Calculator
Calculate arcsin, arccos, and arctan values to find angles from trig ratios
Degrees to Radians Calculator
Convert degrees to radians with decimal and pi-form results
Radians to Degrees Calculator
Convert radians or pi fractions to degrees with step-by-step working
Pythagorean Theorem Calculator
Calculate a hypotenuse or missing right-triangle side using a squared plus b squared equals c squared
Right Triangle Calculator
Calculate all sides, angles, area, and perimeter of a right triangle from two known values
30-60-90 Triangle Calculator
Calculate all sides of a 30-60-90 triangle from any one side using the 1 to square-root-3 to 2 ratio
45-45-90 Triangle Calculator
Calculate the legs and hypotenuse of an isosceles right triangle from any one side
Equilateral Triangle Calculator
Calculate area, height, perimeter, and angles of an equilateral triangle from side length
Isosceles Triangle Calculator
Calculate area, height, base angles, apex angle, and perimeter from equal sides and base
Law of Sines Calculator
Apply the sine rule to find missing sides and angles in non-right triangles
Law of Cosines Calculator
Apply the cosine rule to find a missing side or angle in any triangle
Perimeter Calculator
Calculate perimeter for squares, rectangles, triangles, circles, and regular polygons
Rectangle Calculator
Calculate area, perimeter, and diagonal of a rectangle from length and width
Hexagon Calculator
Calculate area, perimeter, diagonals, and apothem of a regular hexagon
Circumference Calculator
Calculate circle circumference from radius or diameter, with radius, diameter, and area shown
Ellipse Calculator
Calculate ellipse area and approximate perimeter using semi-major and semi-minor axes
Trapezoid Calculator
Calculate area and perimeter of a trapezoid or UK trapezium from parallel sides, height, and side lengths
Polygon Calculator
Calculate area, perimeter, interior angles, exterior angles, and angle sums for regular polygons
Recipe Scaler Calculator
Scale recipe ingredients up or down by servings, batch size, or multiplier
Cake Tin Size Converter
Convert cake tin sizes and estimate the ingredient scaling factor between round or square tins
Oven Temperature Converter
Convert Celsius, Fahrenheit, and UK gas mark oven temperatures
Gas Mark Converter
Convert UK gas marks to Celsius and Fahrenheit oven temperatures
Baking Pan Conversion Calculator
Compare baking pan areas and estimate recipe scaling between tins or trays
Flour Grams to Cups Converter
Convert flour between grams and cups using practical baking density estimates
Sugar Grams to Cups Converter
Convert granulated sugar between grams and cups for recipes
Butter Grams to Tablespoons Converter
Convert butter between grams, tablespoons, and teaspoons for recipes
Yeast Converter
Convert between instant, active dry, and fresh yeast quantities
Baker's Percentage Calculator
Calculate baker percentages for flour, water, salt, yeast, and recipe scaling
Dough Hydration Calculator
Calculate bread dough hydration percentage from flour and water weights
Cooking Time Adjustment Calculator
Estimate cooking time changes when portion size, weight, or oven temperature changes
Volumetric Weight Calculator
Calculate parcel volumetric weight from length, width, height, and courier divisor
Dimensional Weight Calculator
Compare dimensional weight with actual weight to estimate chargeable parcel weight
Parcel Girth Calculator
Calculate parcel girth and length plus girth for courier size checks
CBM Calculator
Calculate cubic metres for cartons, pallets, freight, and container planning
Pallet Load Calculator
Estimate boxes per pallet from pallet footprint, carton footprint, and stack height
Container Load Calculator
Estimate freight container utilisation from shipment CBM and container size
Freight Cost Calculator
Estimate freight cost from base charges, weight or CBM rate, surcharges, and VAT
Shipping Markup Calculator
Calculate marked-up shipping prices, margin, and customer charge from carrier cost
Royal Mail Parcel Size Checker
Estimate whether parcel dimensions fit common Royal Mail parcel size bands
Courier Price Comparison Calculator
Compare courier quotes including surcharges, insurance, handling fees, and VAT