Time And Date calculators

Time and date calculators for duration, age, countdowns, and scheduling. Handles leap years, time zones, and daylight saving correctly.

7 calculators

• Age Calculator

  Work out exact age in years, months, and days between a date of birth and any reference date. Also shows total days lived, day of the week born, and the next birthday.

• Age Difference Calculator

  Enter two dates of birth and get the exact age gap in years, months, and days — plus the total days, weeks, and months between them.

• Countdown Calculator

  Count the days, weeks, hours, minutes, and seconds remaining until any target date — or how long it has been if the date is already past.

• Date Calculator

  Add or subtract days, months, and years from any date. Returns the resulting date in long form and ISO 8601, the day of the week, and the total day shift.

• Day Counter

  Count the exact number of days between two dates — and see the same span as years/months/days and as weeks. Works for past, future, or mixed.

• Time Duration Calculator

  Find the elapsed time between two times of day. Returns hours and minutes, decimal hours, total minutes, and flags whether the duration crosses midnight.

• Workday Calculator

  Count the number of working days — Monday to Friday — between any two dates. Optionally exclude a number of public holidays. Useful for project deadlines, contract terms, payroll periods, and statutory time limits.