Age calculator
Calculate exact age on any reference date in years, months, days and total elapsed time.
Exact age
Find an exact age in years, months and days on any reference date. It uses calendar dates, not an average year length, and nothing leaves your browser.
Calendar-accurate subtraction
The tool subtracts years, then months, then days and borrows from the preceding calendar month when needed.
Choose any reference date
Use today for a current age, or set a past or future date for eligibility and milestone checks.
Frequently asked questions
How are leap-day birthdays handled?
The calculation follows calendar boundaries and the actual number of days in each month.
Does time of day matter?
No. This calculator works with local calendar dates only.
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