Age Calculator
Calculate exact age in years, months, and days, plus total days lived and days until next birthday.
Enter your details
Defaults to today
Result
Enter your details on the left, then press Calculate.
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Frequently asked questions
How is exact age calculated?
We subtract your date of birth from the target date and produce years, months, and days. Months use the calendar (28-31 days), not a fixed 30. The result matches what 'turning N' means in everyday speech.
Why is my age in days higher than years × 365?
Every 4 years has a leap year with 366 days. Over a typical lifespan you accumulate roughly 1 extra day every 4 years from leap days, so total days lived exceeds years × 365.