How is age calculated?

From a birth date to today (or a chosen date), giving years, months and days.

Is my birth date uploaded?

No. The calculation is done in your browser and nothing is stored.

Yes, set any target date to see the age at that point.

Yes, the day count correctly handles leap years.

Yes, it can show how long until the next anniversary of the date.

Yes, quickly confirm whether someone meets an age requirement on a given day.

生年月日から年・月・日で年齢を表示。

Birth date

生年月日から正確な年齢（年・月・日）、または任意の 2 日付の間隔を計算します。素早く正確です。

使い方

よくある質問

How is age calculated?: From a birth date to today (or a chosen date), giving years, months and days.
Is my birth date uploaded?: No. The calculation is done in your browser and nothing is stored.
Can I calculate age on a future date?: Yes, set any target date to see the age at that point.
Does it account for leap years?: Yes, the day count correctly handles leap years.
Can I find days until a birthday?: Yes, it can show how long until the next anniversary of the date.
Is it useful for eligibility checks?: Yes, quickly confirm whether someone meets an age requirement on a given day.