Free tools / Calculators
Age calculator
Find your age in years, months and days, total days lived and your next birthday using calendar dates.
Enter your details to get started
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How to use this tool
- 01
Choose your date of birth.
- 02
Keep today or choose another reference date.
- 03
Read your calendar age and next birthday details.
Try this: Choose a past reference date to find your age on a particular anniversary.
A few useful answers
How are leap-day birthdays counted?
February 29 birthdays fall on February 28 in non-leap years. Completed years are counted first, then calendar months from the last birthday, clamped to shorter month ends. Remaining days are counted exactly. Dates use UTC calendar arithmetic to avoid daylight-saving offsets.