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Time & life

Age calculator

Calculate your exact age as of today.

Your result

Complete the fields and calculate.

Calculation method and formula

Date of birth → today

Understand the inputs

Date of birth
Enter a valid calendar date. Start/end-day conventions are explained below.

Assumptions and limitations

Calendar days are not working days. Date distance is the day difference without an extra end day; month values explicitly use an average month length. Time zones and holidays are not added.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Date of birth
1990-01-01
Example result36 years

Plus 9 full months since the last birthday.

Example date: October 17, 2026. Your calculation uses today's date.

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does Age calculator work?+

Date of birth → today. Calendar days are not working days. Date distance is the day difference without an extra end day; month values explicitly use an average month length. Time zones and holidays are not added.

What assumptions should I consider for this result?+

Calendar days are not working days. Date distance is the day difference without an extra end day; month values explicitly use an average month length. Time zones and holidays are not added. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

Toolbox

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