Age Calculator
Calculate exact age in years, months, and days between a birth date and any other date. Free and private, right in your browser.
Find out exactly how old someone is (or will be) down to the day. Enter a birth date and get the age in years, months, and days, plus the total in days or weeks if you're curious.
How to use it
- Enter the birth date
- Pick the date to calculate age on (defaults to today)
- Read the exact age in years, months, and days
Frequently asked questions
- Why does it show years, months, and days instead of just one number?
- Because "how old are you" usually means completed years, but the months and days remainder matters for things like custody schedules, visa rules, or just knowing exactly how close the next birthday is.
- Can I calculate age as of a past or future date, not just today?
- Yes, set the second date to any day you need, useful for figuring out someone's age on a specific event date, or checking an age-eligibility cutoff.
- Does it account for leap years correctly?
- Yes, the calculation is based on actual calendar dates, so leap years and varying month lengths are handled automatically rather than assuming a flat 365-day year.
- 1
Nothing is uploaded
The file never leaves your device. There is no server to send it to, so there is nothing to leak, log, or subpoena.
- 2
No signup, no limits
No account, no email, no daily cap, no watermark, and no paid tier waiting behind the third file.
- 3
Works offline
Load the page once and it keeps working with the network off, because all the work was always happening locally.