Calculate age from a birth date

Calculate exact age in years, months and days from a birth date.

Your file stays on your device.This tool processes supported files locally in your browser.

Birth date

As-of date (optional, defaults to today)

How this tool works

Enter a birth date, and optionally an as-of date, and ToolRefinery computes exact age locally using calendar-accurate year/month/day arithmetic.

Enter values directly into the calculator fields above; no file is required.

This calculation runs entirely on your device. Your inputs are not sent to a ToolRefinery processing server.

Calculate the number of days and weeks between two dates.

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