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Age Calculator
Exact age in years, months and days, with the totals and the next birthday.
FreeRuns in your browser
About the Age Calculator
Enter a date of birth and read the age in whole years, months and days, counted on the calendar rather than by dividing days by 365. It also gives the total days, weeks and months lived, the weekday somebody was born on, and how long until the next birthday, which for a 29 February birthday falls on the 28th in ordinary years.
How to use it
- 1Pick the date of birth.
- 2Leave the second date empty for today, or set it to work out an age on a particular day.
- 3Read the age, the totals and the next birthday.
Questions
Why not just divide the days by 365?
Because leap years make that drift: every four years it adds a day of error, so a long life comes out weeks short. Counting whole calendar years, then months, then the days left, is how age is meant to be counted.
Is this useful for forms and applications?
Yes. Passport, visa and school forms usually want age on a specific date, which is what the second field is for.
Are my figures saved or sent anywhere?
No. The calculation happens in this browser tab as you type. Nothing you enter is sent to KuponGuru or stored.
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