Age Calculator

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Calculate completed years, months and days between a birth date and an as-of date.

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How it works

This tool uses calendar anniversaries. If a month does not contain the original day, the anniversary is clamped to the last day of that month. It is not a legal age determination.

Example

A birth date of 1 January 2000 and an as-of date of 1 January 2026 gives 26 years.

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