Age Calculator
Calculate age from the date of birth and today’s date. Use this free age calculator for fast, clear results with no signup required.
Age Calculator guide
What it is for
Plan age calculator using dates, times, durations, or calendar inputs.
How it is calculated
Subtract birth year from the current local year and subtract one if this year’s birthday has not yet occurred. The date of birth must not be in the future.
Assumptions
The dates, time zone, breaks, daylight-saving behavior, and work rules describe your situation.
Example
Someone born on January 1, 2000 is 26 on January 1, 2026, but was 25 on December 31, 2025. The current browser date drives your result.
Limitations
Daylight-saving changes, holidays, breaks, travel, and employer policies may require a separate check.