Free Online Age Calculator
Handy for forms that ask for days, and for planning a birthday the week before it lands.
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How to use Age Calculator
- Enter the date of birth.
- Optionally pick another date to measure against.
- Read the breakdown.
Questions about Age Calculator
Why do two ages appear?
Completed years versus total months and days; official forms usually want completed years.
How are leap years handled?
Exactly: a February 29 birthday counts a year on the following day in non-leap years.
About Age Calculator
Calculate exact age from a date of birth with our free online Age Calculator. 100% browser-based, fast, and private—no login or file uploads required.
These calculators and converters turn everyday numbers into answers instantly: percentages, BMI, loans and interest, units, colours and dates, with the formula shown so you can check the working.
This tool runs in your browser. The file is not uploaded. Results update as you type and are rounded for display; for money or legal figures keep the unrounded value and double-check against your own spreadsheet before relying on it.