Is this age calculator free?

Yes, completely free with no signup and no usage limits.

Does it upload my birthdate anywhere?

No. All calculations run in your browser using JavaScript — your birthdate never leaves your device.

Yes. Works in Safari, Chrome, and Firefox on iOS and Android.

生年月日から年・月・日・時間単位で正確な年齢を計算。

Birthdate As of date (defaults to today)

Enter a birthdate using the date picker. The age is calculated instantly against today's date.
Optionally change the "As of date" to calculate age at any point in the past or future.
Results show age in years, months, days, total days alive, and days until the next birthday.

Is this age calculator free?: Yes, completely free with no signup and no usage limits.
Does it upload my birthdate anywhere?: No. All calculations run in your browser using JavaScript — your birthdate never leaves your device.
Does it work on mobile?: Yes. Works in Safari, Chrome, and Firefox on iOS and Android.

Last updated: 2026-05-20 By jarvisbox