Date & Time Calculators

Age, date differences, business days, timesheets and timestamps.

15 calculators in this category.

Durations

Countdown Calculator — Count down to any future date in days, weeks, hours and business days.
Time Card Calculator — Total a weekly timesheet from daily clock-in and clock-out times.
Time Difference Calculator — Add or subtract hours, minutes and seconds, or find the gap between two times.
Time Duration Calculator — Calculate the duration between two times, with optional break deduction.
Unix Timestamp Converter — Convert between Unix timestamps and human-readable dates.

Age Calculator — Calculate exact age in years, months and days, plus total days, hours and minutes.
Date Add / Subtract Calculator — Add or subtract days, weeks, months or years from any date.
Date Difference Calculator — Find the time between two dates in years, months, days, weeks and business days.

Birthday Countdown Calculator — Count down to your next birthday and see the age you will turn.
Business Days Calculator — Count working days between two dates, excluding weekends and holidays.
Day of the Week Calculator — Find which day of the week any date falls on, past or future.
Days in Year Calculator — Find how many days, weeks and working days a year contains.
Leap Year Calculator — Check whether a year is a leap year and find the leap years around it.
Week Number Calculator — Find the ISO week number for a date, or the dates in a given week.
Work Hours Calculator — Total weekly work hours and pay, including overtime above a threshold.