Three calculators in one: exact age from a birth date, the duration between two dates with total days and working days, and a date plus or minus any number of days, weeks, months or years.
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Get the duration in years, months and days, plus total days, weeks, months and hours. Working days are counted with the weekend you choose (Saturday–Sunday, Friday–Saturday, Friday only, Sunday only or none), useful for deadlines, notice periods, leave and project plans. Tick “Include the end date” when both days count.
Find the date a number of years, months, weeks and days before or after another date, for due dates, warranties, contracts and expiry dates. Adding a month to 31 January gives the last day of February. Choose working days only to skip weekends. Every result can also be shown in another calendar, such as Hijri, Persian, Hebrew or Chinese.
No. All calculations run in your browser.
By calendar months: from 15 March to 15 April is one month, whatever the number of days.
Yes. Leap days are included, and a 29 February birthday falls on 28 February in other years.
No, only the weekend you choose is excluded; subtract holidays yourself if needed.
Yes. Choose a calendar under “Also show dates in” to see every date in it as well.
The default weekend follows your language and region where the browser knows it; you can always change it.