Age Calculator
Enter a date of birth to get an exact age in years, months, and days — as of today or any date you choose.
Enter a date of birth
How to use this tool
- 1Enter the date of birth.
- 2Leave "Age as of" set to today, or change it to calculate age on a different date.
- 3Read the exact age breakdown, plus total days and weeks.
Frequently asked questions
Can I calculate someone’s age on a future or past date, not just today?+
Yes — change the "Age as of" field to any date. This is useful for things like eligibility cutoffs or legal age requirements on a specific date.
Does this account for leap years?+
Yes — the calculation is based on actual calendar dates, so leap years are handled automatically and don’t throw off the result.
Does this tool store or send my date of birth anywhere?+
No — the calculation happens entirely in your browser. Nothing you enter is uploaded or saved.