Free tool · Dates
Runs in your browser. Nothing is uploaded or saved on our servers.
Enter a date of birth to see the age.
Enter a date of birth. The result shows the age in years, months and days today. Change the "Age on" date to see the age on any other day, such as a school cut-off or an event. Press "Add another person" to compare two ages. The calculator gives the arithmetic only; it is not legal, medical or financial advice, and rules that depend on age (voting, retirement, benefits) are set by the body that applies them.
We count full years from the date of birth, then full months, then the remaining days, up to the chosen date. Month ends are handled by using the last day of a shorter month: 31 January plus one month is 28 February (29 in a leap year).
In non-leap years you can choose whether the birthday falls on 28 February or 1 March. Laws differ by country, so check the rule that applies to you.
Your device's date is used for today. Dates you type are plain calendar dates, so daylight saving never changes a result.
No. It stays in the page. The dates you enter are never sent or saved.
Months have different lengths, so sites that borrow days from a different month can differ by a few days. We always add whole months to the date of birth first, then count the days left over.
Yes. Set the "Age on" date, for example a school cut-off date or an event.
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