CalculatorAge Calculator
Born on , age on
How to use
Pick a date of birth. The second date starts as today; change it to find someone's age on any other day, such as the day of an exam or a trip.
How age is counted
Age goes up by one on each birthday. Someone born on May 10, 2000 is 25 on May 9, 2026 and turns 26 on May 10, 2026. This is the most common way of counting age, but the rules can differ from country to country.
Born on February 29?
In years without a February 29, the calculator counts the birthday on March 1, which is a common convention. Some places use February 28 instead, so check local rules if it matters legally.
What else it shows
- Years, months and days: for example, 25 yr 11 mo 29 d.
- Days lived: how many days have passed since the date of birth (the birth date itself is day 0), handy for milestones like 10,000 days since birth.
- Days until the next birthday.
FAQ
Is my birth date saved?
No. It is only used on your device to do the calculation.
Does it work for pets or anniversaries?
Yes. Any start date works: a wedding date gives the years married, a company's founding date gives its age.