AgeGapCalc Free Tool
Independent · Ad-supported · Privacy-first

About AgeGapCalc

AgeGapCalc is a small, independent set of free calculators for dates and ages. We built it because most date tools online are either buried under pop-ups or quietly wrong on the awkward cases — leap years, month-end dates, and the everyday question of exactly how much older one person is than another.

Written by the AgeGapCalc team · Last verified: 2026-09-11

  • No accounts, ever
  • Runs in your browser
  • Free and ad-supported
3
Free calculators
100%
Client-side maths
0
Data collected
30+
Guides published

What we care about

Three principles shape every page on this site.

Accuracy

All the maths is calendar-aware and checked against known cases, including 29 February and 31-day month boundaries. The age calculator applies the very same logic to a single birth date.

Privacy

Every calculation runs entirely in your browser. No birth dates are sent to our servers, nothing is stored, and there are no accounts to create. See how we handle data in our Privacy Policy.

Speed

The pages are lightweight and load quickly, even on mobile and slow connections. No bloat, no tracking walls — just the tool you came for, ready in a moment.

How the tools fit together

Three calculators share one engine. The age difference calculator compares two people and reports who is older; the age calculator works out one person's age in years, months, and days; and the date duration calculator measures the span between any two calendar dates. They are linked from every page so you can jump between them without going in circles.

Age Difference Calculator
Compare two people and see the exact gap in years, months, and days.
Age Calculator
Work out one person's age in years, months, and days.
Date Duration Calculator
Days, weeks, and total time between any two dates.

Who writes this

AgeGapCalc Team

A small independent team building free, private, browser-based age and date calculators. Every guide is reviewed against primary sources — official calendars, standards such as ISO 8601, and reputable date references — before it goes live.

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How we make money

This site is supported by advertising (Google AdSense). Ads are placed so they never get in the way of the tool you came to use. We explain exactly how that works, including the cookies involved and the choices you have, in our Privacy Policy. If you spot a bug or an answer that looks off, our contact page is the right place to tell us.

A note on accuracy

We strive for correctness and test against known edge cases, but we make no warranty that results are error-free for every input or jurisdiction. For formal purposes — legal age verification, benefits, contracts — always confirm with the relevant authority. The calculators are built for everyday curiosity and planning, and that is what they are good at.

Ready to try it? Compare two birth dates and get the exact age gap in seconds — no sign-up, no data leaving your device.

Calculate an age difference