Time and Date
Age, durations and working-day calculators for everyday date math.
Popular in Time and Date
All Time and Date calculators
Date Difference Calculator
Find the number of days, weeks, months and years between two dates.
Add or Subtract Dates Calculator
Add or subtract days, weeks, months or years from a date.
Working Days Calculator
Count working days between two dates, excluding weekends and holidays.
Time Duration Calculator
Find the duration between two times of day.
Hours Worked Calculator
Calculate hours worked from start time, end time and unpaid break.
Day of the Week Calculator
Find out what day of the week any date falls on.
Time Card Calculator
Calculate total weekly hours and overtime from a 7-day timesheet.
Timezone Converter
Convert a date and time between timezones.
Countdown Timer
Count down the days, hours, minutes and seconds to any date.
Online Stopwatch
A simple online stopwatch with lap timing.
Leap Year Calculator
Check if a year is a leap year and find the next and previous leap years.
Moon Phase Calculator
Find the moon's phase and illumination percentage for any date.
Anniversary & Birthday Countdown Calculator
Find the days remaining until your next birthday or anniversary.