Age calculator
Put in a date of birth and see the exact age in years, months and days, how many days old, and how long until the next birthday. Use any date to find an age at that time.
Dates
Today by default. Change it to see an age on any other date.
Age
Age is counted in whole years from the date of birth, then whole months, then days. If the birthday hasn't arrived yet this year, the year count is one lower. People born on 29 February have their birthday on 1 March in non-leap years in this calculator (in the UK the legal age of a leapling in a non-leap year is reached on 1 March).
Nothing you type is sent anywhere. The date lives in this page only, and it's gone when you close the tab.
How is my exact age worked out?
Complete years first, then complete months since your last birthday, then the days left over.
Can I find someone's age on a past or future date?
Yes. Change the 'Age on' date, for example to a school cut-off date or the day of an event.
Is my date of birth stored?
No. It stays in this browser tab and is not sent or saved.
What if I was born on 29 February?
In a non-leap year the next birthday is shown as 1 March, which is the date the law uses in the UK.
Everything happens in your browser. Nothing you type or add is uploaded to us or anyone else, and the tool works with no account.
Free to use. Results are for convenience: check anything important before you rely on it.