Age
Work out your age in years, months, days, weeks and hours from your date of birth.
Date and time calculators
Age, days between dates, working days, hours worked and time zones.
Tools in this category
Days between dates
Count the days, weeks and months separating any two dates.
Hours worked
Work out effective working time after breaks, night shifts included.
Days until
Count the days remaining (or elapsed) between today and the date you choose.
Add days
Get the resulting date after adding a period to a starting date.
Working days
Count business days while excluding weekends and public holidays.
Subtract days
Find out what date it was a given period before a reference date.
Date and time
Counting days by hand goes wrong because months differ in length and leap years break the pattern. These calculators use the full Gregorian calendar and run in UTC so daylight saving never shifts a result.
Results are shown in days, weeks, months or years depending on the tool.