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Age calculator

Find your exact age in years, months and days, or anyone's age on any date.

Free No sign-up Runs in your browser

How it works

How to use the Age Calculator tool

  1. 1

    Enter a date of birth

    Use the date picker or type the date.

  2. 2

    Choose the date to measure to

    It's today by default. Change it to find an age on a past or future date.

  3. 3

    See the result

    Exact age, total months, weeks, days and hours, plus days until the next birthday.

How exact age is calculated

The calculator counts whole months from your birth date, handling months of different lengths (Jan 31 plus one month is the end of February), and then counts the remaining days. Leap years are fully accounted for. If you were born on 29 February, your birthday is observed on 28 February in non-leap years.

Common uses

Checking age eligibility for exams, jobs, pensions and government schemes, which often specify an age on a particular cut-off date. Set “Age on” to that date for an exact answer.

Limitations

We’d rather be upfront about what this tool can’t do yet:

  • Time of birth and time zones aren't considered; the calculation is by calendar date.
  • Total hours is approximate (days × 24).

FAQ

Frequently asked questions

How do I calculate my age on a specific date?

Enter your date of birth, then change “Age on” to the date you need, such as an exam's eligibility cut-off.

Is my date of birth stored?

No. The calculation happens in your browser and nothing is saved or sent.

What if I was born on 29 February?

In non-leap years your birthday is counted on 28 February, the most common convention.

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