Age Calculator
Enter a date of birth to see the exact age today — or on any other date — in years, months and days, plus the countdown to the next birthday.
Last updated: 8 November 2026
Calculate your age
How age is calculated
Age is counted in completed years: you turn one year older on your birthday, not before. After the full years, the calculator counts completed months and then the remaining days, the same way a person would count on a calendar. It also shows the total number of days lived, which is simply the days between the two dates.
Birthdays on 29 February
If you were born on 29 February, you only have a calendar birthday in leap years. In other years most people celebrate on 28 February, and the calculator uses 28 February as the next birthday in a common year. Legally, some countries treat 1 March as the date you turn a year older — check the rule where it matters, for example for a driving licence.
Different ways to count age
Most of the world uses this "international" age. Korea officially switched to it for legal purposes in June 2023, replacing the traditional system where a baby was one year old at birth and everyone gained a year on 1 January. In traditional Chinese reckoning (xusui), a person is also one at birth and adds a year at Chinese New Year. If someone quotes an age one or two years higher than this calculator, that is usually why.
Useful related tools
To see the weekday you were born, use the day of the week calculator. To find your Chinese zodiac animal, enter your birth date there. To count the days between any two dates, use days between dates.
Frequently asked questions
- How do I calculate my exact age?
- Enter your date of birth above. The result shows years, months and days, plus total days.
- Can I calculate age on a past or future date?
- Yes. Change the 'age on this date' field.
- What if I was born on 29 February?
- In non-leap years the calculator uses 28 February as your birthday.
- Is my date of birth saved?
- No. Everything is calculated in your browser.