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Age Calculator – Exact Age in Years, Months, Days

Find your exact age today – or on any date – in years, months and days, plus total weeks, days, hours and how long until your next birthday.

Age Calculator

Date of birth and the date to calculate age on

How this age calculator works

It counts full years from your date of birth to the chosen date, then the remaining full months, then the leftover days – the same way people normally state an age. Leap years and month lengths are handled automatically. Leave the second date blank to use today.

Common uses

Checking exact age for school enrolment, sports age groups, retirement or Social Security eligibility, legal documents, or simply finding out how many days you have been alive and on which weekday you were born.

How many days old am I?

Multiply your age in years by 365.25 for a quick estimate, or use the calculator for the exact figure. A 30-year-old has lived roughly 10,957 days.

Age on other planets

Fun fact: a year on Mars is 687 Earth days, so a 30-year-old is only about 16 in Mars years. A Mercury year is 88 days, making the same person about 124 Mercury years old.

More free calculators

QuickCalc USA has more free tools for money, work, school and health. See all calculators.

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