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Age calculator

Enter a date of birth to get the exact age in years, months and days, how many days you have lived and how long until the next birthday.

Free and private. Everything runs in your browser, nothing is uploaded.

How it works

  1. Enter the date of birthPick the date in the calendar or type it.
  2. Choose the dateToday by default, or any date to get the age then.
  3. Read the ageYears, months and days, plus totals and the next birthday.

Exact, calendar based

Age is counted the way people count it: full years first, then full months, then the remaining days, using the real length of every month. Someone born on 31 January is one month older on the last day of February, and someone born on 29 February celebrates on 28 February in years without a leap day.

Change the second date to find out how old someone was at an event, or how old they will be on a future date such as a retirement, a school start or a visa deadline.

Fun numbers

Below the age you see the total in months, weeks, days and hours, plus the weekday you were born. Many people celebrate their 10,000th day, which is at about 27 years and 4 months.

Frequently asked questions

How is the age calculated?

Full calendar years, then full months, then remaining days, using the real length of each month.

What about people born on 29 February?

In years without 29 February, the birthday is counted on 28 February.

Can I calculate age on a past or future date?

Yes. Change the second date.

Is my date of birth stored?

Only in your own browser, so it is filled in next time.