12 calculatorsDates, ages, and hours
Date & Time
Date and time calculators handle the counting that calendars make tricky: an exact age, the days between two dates, a date a number of days away, business days, a countdown to an event, or the week number. Others add up hours on a time card, convert military time, or translate Unix timestamps. Each one explains how it counts, including whether end dates are included and how leap years are handled.
- Age Calculator Free age calculator: enter a date of birth to see your exact age in years, months and days, total days and weeks, and the countdown to your next birthday.
- Date Calculator Free date calculator: add or subtract years, months, weeks and days from any date to get the resulting date, its weekday and the number of days in between.
- Time Duration Calculator Time duration calculator: find the hours and minutes between two times or two dates, subtract an unpaid break and get decimal hours for your timesheet.
- Time Calculator Time calculator: add or subtract hours, minutes and seconds, total a timesheet in hours and decimal hours, find the end time and estimate gross pay.
- Business Days Calculator Business days calculator: count the workdays between two dates or add business days to a date, skipping weekends and U.S. federal holidays (observed).
- Date Difference Calculator Date difference calculator: count the days between two dates, with years, months and days, weeks, weekdays Monday to Friday, total months and hours.
- Days Until Calculator Days until calculator: count the days to Christmas, Thanksgiving, July 4 or any date you pick, with weeks, months, weekdays and hours, or days since.
- Week Number Calculator Week number calculator: find the ISO 8601 week and the US (Sunday-start) week number for any date, or get the Monday–Sunday dates of any ISO week.
- Military Time Converter Military time converter: turn 2:30 PM into 1430 or 1430 back into 2:30 PM, see how the time is said aloud, and use a full 24-hour military time chart.
- Time Card Calculator Time card calculator: add up a week of start and end times minus unpaid breaks, including overnight shifts, and see regular hours, overtime and gross pay.
- Unix Timestamp Converter Unix timestamp converter: turn epoch seconds or milliseconds into a UTC and local date with DST, or a date and time into a timestamp. Year 2038 check.
- Time Zone Converter Time zone converter and world clock: compare up to 10 cities, see US and European daylight saving changes, and find a meeting time that fits every office.