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
121 free calculators
Math calculators with step-by-step working
Every formula shown clearly - perfect for students, teachers, and professionals.
45-45-90 Triangle Calculator
Calculate the legs and hypotenuse of an isosceles right triangle from any one side
Absolute Value Calculator
Calculate absolute value and solve simple absolute value equations
Adding Fractions Calculator
Add two or more fractions using the least common denominator method
Area Calculator
Calculate the area of common 2D shapes with formula substitutions and unit conversions
Arithmetic Sequence Calculator
Calculate arithmetic sequence nth term, common difference, and sum
Binary Calculator
Calculate binary arithmetic, convert between binary decimal hex and octal, and perform bitwise operations
Box Plot Calculator
Calculate five-number summary, quartiles, IQR, fences, and outliers
Chi-Square Calculator
Calculate chi-square statistic, degrees of freedom, and p-value from observed and expected counts
Circle Calculator
Calculate radius, diameter, circumference, area, arc length, sector area, chord length, and segment area
Circle Equation Calculator
Convert circle equations between standard and general form
Circumference Calculator
Calculate circle circumference from radius or diameter, with radius, diameter, and area shown
Combinations Calculator
Calculate nCr combinations for selections where order does not matter
Comparing Fractions Calculator
Compare, rank, and order fractions from least to greatest or greatest to least
Confidence Interval Calculator
Calculate confidence intervals for population mean and proportion with z-interval and t-interval working
Correlation Calculator
Calculate Pearson correlation coefficient for paired x and y data
Cosine Calculator
Calculate the cosine of an angle in degrees or radians with sine and tangent context
Cube Root Calculator
Calculate cube roots for positive and negative real numbers
Decimal to Fraction Calculator
Convert terminating and simple repeating decimals to fractions in simplest form
Decimal to Percent Calculator
Convert decimals to percentages by multiplying by 100 with step-by-step working
Degrees to Radians Calculator
Convert degrees to radians with decimal and pi-form results
Distance Calculator
Calculate the distance and midpoint between two points in 2D or 3D space with step-by-step working
Ellipse Calculator
Calculate ellipse area and approximate perimeter using semi-major and semi-minor axes
Equilateral Triangle Calculator
Calculate area, height, perimeter, and angles of an equilateral triangle from side length
Equivalent Fractions Calculator
Find equivalent fractions or check whether two fractions are equivalent
Exponent and Root Calculator
Calculate exponents, powers, roots, and scientific notation with step-by-step working
Factor Calculator
Find all factors of any number with prime factorisation, factor pairs, and step-by-step working
Factorial Calculator
Calculate n factorial for whole numbers and combinatorics problems
Fibonacci Calculator
Find Fibonacci numbers, generate the sequence, and compare the golden ratio trend
Fraction Calculator
Add, subtract, multiply, and divide fractions with full step-by-step working
Fraction Exponent Calculator
Calculate fractional exponents using roots and powers
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
Fraction to Ratio Calculator
Convert a fraction into part-to-whole and part-to-remainder ratios
Frequency Distribution Calculator
Group data into class intervals and calculate frequency and relative frequency
Geometric Sequence Calculator
Calculate geometric sequence nth term, common ratio, finite sum, and infinite sum
Gradient Calculator
Calculate gradient between two points using UK GCSE rise over run terminology
Half-Life Calculator
Calculate radioactive decay, half-life, and time elapsed with carbon dating examples
Hex Calculator
Calculate hexadecimal arithmetic, base conversions, and web color codes
Hexagon Calculator
Calculate area, perimeter, diagonals, and apothem of a regular hexagon
Hypothesis Test Calculator
Estimate z-test and t-test statistics, p-values, and degrees of freedom
Improper Fraction to Mixed Number
Convert improper fractions to mixed numbers and mixed numbers to improper fractions
Inequality Calculator
Solve simple linear inequalities and show interval notation
Inverse Trig Calculator
Calculate arcsin, arccos, and arctan values to find angles from trig ratios
IQR Calculator
Calculate interquartile range, quartiles, outlier fences, and outliers
Isosceles Triangle Calculator
Calculate area, height, base angles, apex angle, and perimeter from equal sides and base
Law of Cosines Calculator
Apply the cosine rule to find a missing side or angle in any triangle
Law of Sines Calculator
Apply the sine rule to find missing sides and angles in non-right triangles
LCD Calculator
Find the least common denominator for two or more fractions
LCM and GCF Calculator
Calculate the Least Common Multiple and Greatest Common Factor with step-by-step working
Line Intersection Calculator
Find where two linear equations intersect and identify parallel or identical lines
Line Through Two Points Calculator
Find the equation of a line through two coordinate points with all common forms
Linear Regression Calculator
Calculate least-squares regression line, slope, intercept, r, and R squared
Logarithm Calculator
Calculate logarithms with any base, natural logs, and logarithm equations with step-by-step working
Logarithm Calculator
Calculate logarithms in base 10, natural log, base 2, or any custom base
Marks Percentage Calculator
Calculate percentage score from marks obtained and total marks across one or more subjects
Matrix Calculator
Add, subtract, multiply, invert, transpose matrices and solve systems of equations
Mean, Median, Mode and Range Calculator
Calculate mean, median, mode, range, quartiles, variance, and standard deviation from any dataset
Midpoint Calculator
Find the midpoint and distance between two coordinate points in 2D or 3D
Mixed Number Calculator
Add, subtract, multiply, and divide mixed numbers with step-by-step working
Mixed Number to Improper Fraction
Convert mixed numbers to improper fractions with step-by-step working
Modulo Calculator
Calculate modulo, remainders, Euclidean division, and practical modular arithmetic examples
Normal Distribution Calculator
Calculate normal distribution probabilities using mean and standard deviation
Number Sequence Calculator
Calculate arithmetic, geometric, and Fibonacci sequences and identify unknown sequence patterns
Order of Operations Calculator
Solve arithmetic expressions using BODMAS/BIDMAS order of operations
Parallel Line Calculator
Find the equation of a parallel line through a given point
Percent Change Calculator
Calculate percentage change between two values and identify increase or decrease
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 Error Calculator
Calculate percent error between measured and actual values with step-by-step working
Percent Increase Calculator
Calculate percentage increase or find the new value after an increase
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
Percent to Fraction Calculator
Convert percentages to simplified fractions with full working
Percent to Ratio Calculator
Convert a percentage to part-to-whole and part-to-remainder ratios
Percent to Total Calculator
Find the total when you know a part and the percentage it represents
Percentage Calculator
Calculate percentages five ways including percentage of, percentage change, difference, and add or subtract a percentage
Percentile Calculator
Find percentile values and percentile rank from sorted or unsorted data
Perimeter Calculator
Calculate perimeter for squares, rectangles, triangles, circles, and regular polygons
Permutation and Combination Calculator
Calculate permutations, combinations, and factorials with step-by-step working
Permutations Calculator
Calculate nPr permutations for ordered arrangements and selections
Perpendicular Line Calculator
Find the equation of a perpendicular line through a given point
Point-Slope Form Calculator
Find the equation of a line from one point and a slope
Polygon Calculator
Calculate area, perimeter, interior angles, exterior angles, and angle sums for regular polygons
Prime Number Calculator
Check whether a number is prime, find prime factors, and generate primes
Probability Calculator
Calculate basic probability, combined events, conditional probability, and binomial probability
Pythagorean Theorem Calculator
Calculate a hypotenuse or missing right-triangle side using a squared plus b squared equals c squared
Quadratic Formula Calculator
Solve quadratic equations with the quadratic formula, discriminant, complex roots, and vertex form
Quadratic Function Calculator
Analyse quadratic functions, vertex, roots, axis, range, and direction
Radians to Degrees Calculator
Convert radians or pi fractions to degrees with step-by-step working
Random Number Generator
Generate random integers, decimals, list picks, and unique number sets instantly
Rate of Change Calculator
Calculate average rate of change between two points or values
Ratio Calculator
Simplify ratios, scale ratios, divide totals into ratios, and convert ratios to fractions and percentages
Rectangle Calculator
Calculate area, perimeter, and diagonal of a rectangle from length and width
Right Triangle Calculator
Calculate all sides, angles, area, and perimeter of a right triangle from two known values
Rounding Calculator
Round numbers to decimal places, nearest values, significant figures, or truncate without rounding
Sample Size Calculator
Calculate the sample size needed for statistically valid survey and research results
Scientific Calculator
A fast browser scientific calculator with trigonometry, logarithms, powers, roots, memory, and keyboard support
Scientific Calculator Online
Use a full online scientific calculator with trig, logs, powers, roots, and constants
Scientific Notation Calculator
Convert numbers to and from scientific notation and perform arithmetic in scientific notation
Simplify Fractions Calculator
Reduce fractions to lowest terms using the greatest common factor method
Simultaneous Equations Calculator
Solve two-variable simultaneous equations using determinant and elimination logic
Sine Calculator
Calculate the sine of an angle in degrees or radians with common trig values
Slope and Y-Intercept Calculator
Calculate slope, y-intercept, x-intercept, midpoint, distance, and line equations
Slope Calculator
Calculate slope between two points, convert linear equations, and find parallel or perpendicular lines
SOHCAHTOA Calculator
Find missing sides or angles in right triangles using sine, cosine, and tangent
Solve for Unknown Fraction
Solve fraction equations with an unknown using cross multiplication
Square Root Calculator
Calculate square roots, cube roots, nth roots, and simplified square root form
Standard Deviation Calculator
Calculate population and sample standard deviation and variance with full step-by-step working
Standard Form Linear Equation Calculator
Convert linear equations between standard, slope-intercept, and point-slope form
Subtracting Fractions Calculator
Subtract fractions using common denominators and simplification steps
Surface Area Calculator
Calculate the total surface area of common 3D shapes with component breakdowns and step-by-step working
T-Distribution Calculator
Calculate Student t-distribution probabilities and two-tailed p-values
Tangent Calculator
Calculate tangent values in degrees or radians and identify undefined tangent angles
Trapezoid Calculator
Calculate area and perimeter of a trapezoid or UK trapezium from parallel sides, height, and side lengths
Triangle Calculator
Solve any triangle using SSS, SAS, ASA, AAS, SSA, right triangle, and Pythagorean theorem modes
Trigonometry Calculator
Calculate sine, cosine, tangent, and inverse trig values in degrees or radians
Variance Calculator
Calculate population and sample variance from a dataset with mean and standard deviation
Volume Calculator
Calculate volume for common 3D shapes with formulas, cubic units and litre conversions
X and Y Intercepts Calculator
Find x-intercept and y-intercept points for a linear equation
Z-Score Calculator
Calculate z-scores, percentile ranks, and standard normal distribution probabilities
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General Math
- Absolute Value Calculator
- Binary Calculator
- Cube Root Calculator
- Exponent and Root Calculator
- Factor Calculator
- Fibonacci Calculator
Geometry
- Area Calculator
- Circle Calculator
- Circumference Calculator
- Distance Calculator
- Ellipse Calculator
- Hexagon Calculator
Statistics
- Box Plot Calculator
- Chi-Square Calculator
- Combinations Calculator
- Confidence Interval Calculator
- Correlation Calculator
- Factorial Calculator
Fraction Calculators
- Adding Fractions Calculator
- Comparing Fractions Calculator
- Decimal to Fraction Calculator
- Equivalent Fractions Calculator
- Fraction Calculator
- Fraction to Decimal Calculator
Percentage Calculators
- Decimal to Percent Calculator
- Marks Percentage Calculator
- Percent Change Calculator
- Percent Decrease Calculator
- Percent Difference Calculator
- Percent Error Calculator
Trigonometry Calculators
- Cosine Calculator
- Degrees to Radians Calculator
- Inverse Trig Calculator
- Radians to Degrees Calculator
- Sine Calculator
- SOHCAHTOA Calculator
Triangle Calculators
- 30-60-90 Triangle Calculator
- 45-45-90 Triangle Calculator
- Equilateral Triangle Calculator
- Isosceles Triangle Calculator
- Law of Cosines Calculator
- Law of Sines Calculator
Line Calculators
- Arithmetic Sequence Calculator
- Circle Equation Calculator
- Geometric Sequence Calculator
- Gradient Calculator
- Line Intersection Calculator
- Line Through Two Points Calculator