Age Calculator
Calculate exact age in years, months, and days from a date of birth — plus days to next birthday.
Runs locally in your browser. Your input is not uploaded.
How to Use
- 1
Enter dates of birth
One per line in YYYY-MM-DD format, e.g. 1990-05-20.
- 2
Optionally set a reference date
Leave "As of date" blank for today, or enter a date for age on that day.
- 3
Read the results
See exact age, total days and months lived, and days to the next birthday.
Frequently Asked Questions
- The tool subtracts the birth date from today (or a date you choose) calendar-wise, giving whole years, then months, then days — the same way ages are stated legally — plus total days and months lived.
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