Age calculator
Find age in years, months and days on a date you choose.
Your numbers
Example values are filled in. Change them to suit you.
⌁ Your entries are calculated in this browser.
Your result
Ready when you are.
Enter your numbers and select Calculate to see the breakdown.
Dates are treated as calendar dates without a time of day. For 29 February birthdays, this tool uses 28 February in a non-leap year. This is not a legal age determination.
How it works
Complete calendar years and months are counted first, then remaining days. When an anniversary date does not exist in a month, the last day of that month is used.
A quick example
Someone born on 15 June 1990 is 35 years, 0 months and 0 days old on 15 June 2025.
Good to know
Does this account for leap years?
Yes, calendar calculations account for leap years. The stated anniversary convention handles 29 February.
Can I check age on a future date?
Yes, through 2100. The age-on date must be on or after the birth date.