How accurate is this age calculator?

This age calculator computes exact calendar age using years, months, and days between two dates, including leap years and month-length differences.

Can I calculate age on a past or future date?

Yes. Set an optional target date to calculate age as of that date instead of today.

Does this tool work on mobile?

Yes. The interface is fully responsive and works on phones, tablets, and desktop browsers.

Is my date of birth stored anywhere?

No. All calculations happen in your browser. No personal date data is sent to a server.

Age Calculator - Calculate Exact Age Online

Age Calculator

All calculations run locally in your browser

Date of Birth

Target Date (optional)

If left blank, today's date is used.

Compare Two Dates

Date A

Date B

Frequently Asked Questions

How is age calculated exactly?

We calculate exact calendar age by subtracting birth date from the target date and handling month/day borrowing correctly across month lengths and leap years.

Can I calculate age at a future date?

Yes. Use the optional target date field to calculate age on a past or future date instead of today.

What does next birthday countdown show?

It shows how many days remain until your next birthday from today, plus the date and age you'll turn.

Is this age calculator free?

Yes, completely free. No signup needed.

Calculate Your Exact Age Instantly

Age Calculator

Compare Two Dates

Frequently Asked Questions