Date & Time Calculators
Count days between dates, add or subtract time, find ages and convert time zones.
- Age CalculatorCalculate exact age in years, months and days from a date of birth, plus total months, weeks and days and the next…
- Date Difference CalculatorCount the days between two dates, and see the gap in years, months, weeks and weekdays.
- Add or Subtract Days CalculatorAdd or subtract days, weeks, months or years to a date to find the resulting date and weekday.
- Business Days CalculatorCount business days between two dates, or add business days to a date, skipping weekends and optionally US federal…
- Weeks Between Dates CalculatorCount the number of weeks between two dates, as whole weeks plus days and as a decimal.
- Countdown CalculatorCount down the days, hours, minutes and seconds to any date and time, such as a holiday, trip or deadline.
- Time Zone ConverterConvert a date and time between time zones worldwide, with daylight saving time handled automatically and a table of…
- Time Duration CalculatorFind the hours and minutes between two times, even across midnight, or add a duration to a time, with decimal hours.
- Time Card CalculatorAdd up hours worked for the week from clock-in and clock-out times with unpaid breaks, including overnight shifts, with…
- Military Time ConverterConvert standard 12-hour time to military (24-hour) time and back, with how to say it.
- Day of the Week CalculatorFind what day of the week any date falls on, past or future, with the day of the year and week number.
- Julian Date CalculatorConvert a calendar date to a Julian Day Number, Modified Julian Date and the ordinal (YYDDD) date used in manufacturing…
- Unix Timestamp ConverterConvert a Unix timestamp (epoch seconds or milliseconds) to a date and time in UTC and your time zone, and a date back…