Age Calculator

By the FastFreeTools Editorial Team · Last reviewed: May 2026 · See our Editorial Policy for methodology, sourcing, and disclaimers.

Calculate your exact age in years, months, and days. Also shows total weeks, hours, and minutes since birth.

About this tool

Calculating exact age sounds simple, but accounting for leap years, varying month lengths, and time zones makes it surprisingly complex. Our Age Calculator computes your precise age in years, months, and days from any birthdate. It also shows your age in total days, weeks, hours, and even minutes — fun statistics that put your life in perspective. The calculator handles all edge cases including leap year birthdays (February 29th) and correctly accounts for months with different lengths. It's useful for legal age verification, retirement planning, milestone celebrations, and curiosity.

How to use Age Calculator

Enter your date of birth using the date picker.
Optionally set a target date (defaults to today).
View your exact age in years, months, and days.
See additional breakdowns in weeks, hours, and minutes.

Tips & best practices

Use the target date field to calculate age at a specific date.
The calculator correctly handles leap years and varying month lengths.
Fun fact: you can see your age in total seconds!
Great for calculating age requirements for legal purposes.

Common use cases

Determining exact age for legal documents and applications.
Calculating retirement eligibility dates.
Finding the exact time between any two dates.
Birthday milestone tracking and celebrations.

Privacy

This tool runs entirely in your browser. We do not upload, store, log, or process your input on any server. Open your browser's DevTools Network tab to verify — there is no outbound request with your data. See our Privacy Policy for details.

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