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Age calculator
How old someone is on a given day.
Free calculator
Age & Date Calculator
Find an exact age in years, months and days, count the days or weekdays between two dates, or add and subtract days, weeks, months and years from a date.
Calculated in your browser — nothing you enter is stored or sent.
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Days between two dates
The time from one date to another.
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Add to or subtract from a date
The date a number of days, weeks, months or years away.
How dates are counted
- Dates, not times. Every calculation uses calendar dates only, so time zones and daylight saving changes never add or lose a day. "Today" is today's date on your device.
- Months have different lengths. Adding a month keeps the same day of the month. When that day does not exist, the result is the last day of the month: 31 January plus one month is 28 February, or 29 February in a leap year. Spreadsheets do the same (EDATE).
- Birthdays on 29 February fall on 28 February in years that are not leap years, by the same rule.
- Years, months and days count whole years first, then whole months, then the days left over. From 31 January to 1 March is 1 month and 1 day (31 January plus one month is the end of February).
- Days between counts from the start date up to the end date, so from Monday to the next Monday is 7 days. Tick Count the end date too to include both days, for example to count the days of a trip.
- Weekdays are Monday to Friday. Public holidays differ by country and state and are not taken off.
- Dates before 1582 use today's (Gregorian) calendar extended backwards, so they may not match historical records kept in the older Julian calendar.
Private by design
Every calculation runs in your browser. The dates you enter, including a date of birth, are not sent to Doodleden™ or anyone else, and they are not saved.
Nothing you enter is uploaded to or stored by Doodleden™. This site is funded by advertising; our ad partners use cookies and similar technologies as described in our privacy policy.