Age Calculator
Enter a birth date to see exact age, total days lived and a countdown to the next birthday.
Free · No sign-up · Private — runs in your browser
Pick a date of birth to see your exact age.
How to use the Age Calculator
- Pick your date of birth.
- Optionally change the “age at” date.
- Read your age breakdown.
Why use this age calculator?
- Years, months and days
- Total days and weeks lived
- Next birthday countdown
Frequently asked questions
How is age calculated?
We count full years since the birth date, then the remaining full months and days up to the chosen date.
Can I calculate age on a past or future date?
Yes. Change the “Age at” date to any day to see the age on that date.
Does it handle leap years?
Yes. Calendar maths is handled by your browser, including February 29.