Age Calculator – Years, Months and Days
The age calculator uses calendar dates, not time of day. If you leave the reference date empty, it uses today in your browser’s local timezone.
How to use this calculator
The age calculator uses calendar dates, not time of day. If you leave the reference date empty, it uses today in your browser’s local timezone. Results stay in your browser. They are estimates, not financial, tax or medical advice.
Frequently asked questions
Are leap years handled?
Yes. Invalid calendar dates such as 31 February are rejected, and February 29 is treated as a real leap-year date.
Can I calculate age on a past date?
Yes. Enter a reference date on or after the date of birth.