Enter a date of birth. Change the second date to find an age on any day.
How to use it
Pick the date of birth and the date you want the age for (today by default). The result counts whole years first, then whole months, then the remaining days, the same way people state their age.
Month lengths differ, so “one month” after 31 January is the last day of February. People born on 29 February have their birthday counted on 28 February in common years. Total days are exact calendar days and do not depend on your time zone.
Frequently asked questions
How is age calculated?
Full years are counted first, then full months, then the remaining days between the two dates.
What about people born on 29 February?
In years without 29 February their birthday is counted on 28 February.
Can I calculate age at a past or future date?
Yes. Change the “Age on this date” field to any date after the date of birth.