Can I use a future date?

No, the birth date must be in the past.

How is the next birthday calculated?

It finds the next occurrence of your birth month and day from today.

Is my birth date sent anywhere?

No, everything is calculated locally in your browser.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Age Calculator

Calculate exact age and countdown to the next birthday.

Support

Works Offline

Privacy First

No Login

No API

Birth date

Date of birth

Age

Enter a valid birth date in the past.

About the Age Calculator

Enter a birth date to see the exact age in years, months, and days, total days lived, and a countdown to the next birthday.

Examples

Birth date

2000-01-01

Output

26 years, 7 months, 5 days

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser