How do I calculate my exact age?

Enter your date of birth. The calculator compares it with today or your selected age-on date and returns years, months, and days.

Does the age calculator upload my date of birth?

No. The calculation runs locally in your browser.

Age Calculator

Wondering how old you are exactly? Enter a birthday to get your age in years, months, and days, plus days lived, birthday countdown, and a few tiny calendar sparks.

Birthday math runs locally in your browser. No sign-up, no uploads, no awkward party hats required.

Date of birth

Use the birthday you want to calculate from.

Age on date

Defaults to today, but you can calculate age on any date.

Exact age

Years Old

Total Days Lived

Total Weeks

Total Months

Approx. Hours

Born On

Next Birthday

Birthday Countdown

How old am I exactly?

This calculator compares your date of birth with today, or with any date you choose, and returns a calendar age in years, months, and days. It also estimates total days, weeks, months, and hours lived for quick birthday cards, forms, planning, or curiosity.

FAQ

Does this upload my birthday? No. The age calculation runs in your browser.

Can I calculate age on a past or future date? Yes. Change the age-on date to calculate exact age for that date.

How are leap-day birthdays handled? For Feb 29 birthdays, the next birthday countdown uses Feb 28 in non-leap years.