Age Calculator
Calculate exact age in years, months and days, plus total days lived and the next birthday.
Runs in your browser. Your input is processed on your device and is not uploaded to our server.
Defaults to today.
Age
–
–Total months
–Total weeks
–Total days
–Total hours
- Born on a –
- Next birthday –
How to use the Age Calculator
- Enter the date of birth.
- Change the “age on” date if you need the age on a different day.
- Read the age in years, months and days, totals and the countdown to the next birthday.
How age is counted
Age is counted in completed calendar years, then completed months, then remaining days, which is how ages are stated on official forms. If the birth day does not exist in a month (for example the 31st), the last day of that month is used. People born on 29 February are treated as having a birthday on 28 February in non-leap years for the countdown; some jurisdictions use 1 March instead.
Frequently asked questions
Does it handle leap years?
Yes. Day counts use the actual calendar, including 29 February in leap years.
Is my date of birth stored?
No. The calculation happens in your browser.