All tools

Age calculator

Age in years, months and days from a date of birth, the next birthday, and fun facts with their rules. Free, with no account or uploads.

Work out an age

Choose the date of birth. The age is counted to today unless you choose another day.

Dates follow the Gregorian calendar back to year 1, as computers do; before 1582 (1752 in Britain and its colonies) records were kept in the Julian calendar, so old dates may differ from what was written at the time.

How it works and help
Worked out in your browser. Nothing you type is sent anywhere; a country's holidays are read from this site's own files.

A little help along the way

Follow these steps. Every option is explained underneath. Everything runs in your browser; nothing is sent anywhere.

  1. Say what you want to knowHow long between two dates is the usual. The others count down to an event, work out an age, move a date, count working days or give a week number.
  2. Choose the datesToday is filled in. Change either date, or type an event such as Christmas or my birthday 14 March.
  3. Read the answerIt comes first in words, then in days and weeks, with the rule it followed under it.
  4. Keep itCopy the answer, add a day to your calendar, or copy a link that carries the date.

Questions people ask

How is age counted?
Whole years to the last birthday, then whole months, then the days left over, as people and most laws count it. The total in days is given too.
What if I was born on 29 February?
In a common year the birthday is counted on 1 March, as Hong Kong and Taiwan law count it, unless you choose 28 February under More options.
Is my date of birth sent anywhere?
No. The age is worked out in your browser, and nothing you type leaves your device.

This page is the Date calculator, opened for this one job; every other tool it has is one press away. Each of its settings is explained on the Date calculator's own page.

Read the step-by-step guide

Guides

Same tool, other jobs

Tools nearby