Age Calculator
Calculate exact age from date of birth in years, months, days, weeks and total days
36 free calculators
Time and date calculators for every need
Hours worked, date arithmetic, time zones, countdowns, and more.
Age Difference Calculator
Calculate the age gap between two dates of birth in years, months, days, and total days
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
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
Days Since Date Calculator
Calculate how many calendar days have passed since a selected date
Days to Weeks Calculator
Convert days to weeks and remaining days, or weeks back into days
Days Until Calculator
Calculate calendar days, weeks, and remaining days until a future date
Decimal Hours to Time Calculator
Convert decimal hours into HH:MM:SS time format
Download Time Calculator
Estimate download time from file size and internet speed
Hours and Minutes Calculator
Add, subtract, and convert hours and minutes for timesheets, payroll, study time and project tracking
Hours Calculator
Calculate the duration between start and end times with optional break deduction
Hours to Minutes Calculator
Convert hours and extra minutes into total minutes for timesheets, study logs and schedules
Leap Year Calculator
Check whether a year is a leap year and see how many days it contains
Military Time Converter
Convert between 12-hour AM/PM time and 24-hour military time
Minutes to Hours Calculator
Convert minutes into decimal hours and hours-plus-minutes format
Minutes to Time Calculator
Convert minutes into HH:MM:SS time format
Pay Raise Calculator
Calculate a new salary after a pay raise and compare annual, monthly and weekly gross pay
Seconds to Minutes Calculator
Convert seconds into minutes, remaining seconds, decimal minutes and decimal hours
Seconds to Time Calculator
Convert seconds into HH:MM:SS time format
Sleep Time Calculator
Estimate sleep duration and bedtime or wake time ranges from age-based sleep recommendations
Stopwatch Lap Time Calculator
Measure elapsed time with start, pause, resume, reset and lap tracking
Sunrise Sunset Calculator
Calculate sunrise, sunset and day length for a location and date
Time Converter
Convert seconds, minutes, hours, days, weeks, months and years instantly
Time Difference Calculator
Calculate the time between two clock times, including overnight periods and break deductions
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
Time Units Converter
Convert between seconds, minutes, hours, days and weeks
Time Until Calculator
Calculate the time remaining until a future date and clock time
Time Zone Calculator
Convert a date and time from one time zone to another with daylight saving time support
Timer
Build a timer duration from hours, minutes, and seconds with total seconds and minutes
Weekly Hours Calculator
Calculate total hours worked across a full week for timesheets, payroll and shift work
Weeks Between Dates Calculator
Calculate weeks, remaining days, decimal weeks, and total days between two dates
What Time Will It Be Calculator
Add or subtract hours and minutes from a start time and handle midnight rollover
Years Between Dates Calculator
Calculate calendar years, months, days, decimal years, and total days between two dates
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Browse Time calculators and resources
Use these links to move quickly between the most useful calculators, topic groups, guides, and official resources for this category.
Popular calculators
Useful resources
- Date and Time Resources
Quick answers for today's date, days left in the year, dates from today, clocks, and month reference pages.
- UK bank holidays
Official UK bank holiday dates for planning and date calculations.
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Time Converters
- Days to Weeks Calculator
- Decimal Hours to Time Calculator
- Hours to Minutes Calculator
- Minutes to Hours Calculator
- Minutes to Time Calculator
- Seconds to Minutes Calculator
Hours & Time
- Hours and Minutes Calculator
- Hours Calculator
- Military Time Converter
- Time Difference Calculator
- Time Units Converter
- Timer
Date & Calendar
- Age Calculator
- Age Difference Calculator
- Business Days Calculator
- Countdown Timer
- Date Add / Subtract Calculator
- Day of the Week Calculator