Date & time

Age calculator

Calculate age in years, months, and days for any date.

Processed locally

Result

Your answer will appear here.

Help and method

Compare a birth date with your reference date to find completed years, months and remaining days. A future birth date is invalid; leap-day birthdays use the stated anniversary convention.

Methods and reliability

Worked example

An example you can try or adapt to your own values.

Date of birth: January 1, 2000
Age on: September 8, 2026

Result

Exact age: 26 years, 8 months, 7 days Elapsed days: 9,747 days

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Details

Age uses clamped calendar anniversaries. A February 29 anniversary is treated as February 28 in a non-leap anchor year.

Worked example

Result

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