Age Calculator - Exact Age & Birthday Countdown
Calculate exact age in years, months, and days, see time lived in multiple units, and find the countdown to the next birthday.
CALENDAR AGE TRACKING
Enter your birth date to calculate your calendar age in years, months, and days.
Elapsed hours and minutes are estimates counted from local midnight on your birth date because the tool does not ask for a birth time.
Frequently Asked Questions
- How exact is this age calculation?
- Years, months, and days use your local calendar. Hours and minutes are estimates from local midnight on your birth date because no birth time is entered.
- Does it account for leap years?
- Yes. Calendar arithmetic includes leap years. For a February 29 birth date, this calculator uses March 1 as the anniversary in a non-leap year so the age and next-birthday countdown follow one consistent rule.
- Is my birth date stored?
- No, all calculations happen in your browser.
- Why are elapsed hours and minutes estimates?
- The form asks for a birth date but not a birth time, so elapsed hours and minutes are counted from local midnight on that date.
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