Age Calculator

LOCAL · Browser-Only

Calculate your exact age in years, months, and days

Date of Birth

Age at the date of

Defaults to today

Select your date of birth above to calculate your age.

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What is Age Calculator?

Free online age calculator to find out your exact age down to the day.

Enter your date of birth and instantly see your age broken down into years, months, days, hours, and even minutes. The tool calculates your age in days, weeks, and months, counts down to your next birthday, shows the weekday you were born on, and can work out the age difference between two people. Set a custom target date to find how old you were or will be on any given day, which is handy for checking age eligibility, retirement dates, or milestone tracking. Leap years and varying month lengths are handled correctly. Runs entirely in your browser. No signup required.

How to Use Age Calculator

1Enter your date of birth using the date picker or type it manually
2Optionally set a custom target date (defaults to today)
3View your exact age in years, months, and days along with other breakdowns
4Check your next birthday countdown and the day of the week you were born

Frequently Asked Questions

How does the age calculator work?

The calculator takes your date of birth and compares it to today's date (or any target date you specify). It computes the exact difference in completed years, remaining months, and remaining days, accounting for varying month lengths and leap years.

Can I calculate age between two custom dates?

Yes. By default, the tool calculates your age as of today, but you can set a custom target date to find your age at any point in time - past or future. This is useful for determining age eligibility at a specific date.

Does it account for leap years?

Absolutely. The calculator correctly handles leap years and varying month lengths (28, 29, 30, or 31 days). If your birthday is February 29, it will correctly determine your age in both leap and non-leap years.

Can I see my age in different units?

Yes. In addition to years, months, and days, the tool shows your total age in months, weeks, days, hours, and minutes. It also displays your next birthday countdown so you know exactly how long until your next celebration.

How many days old am I?

Enter your date of birth and the calculator shows your total age in days, along with weeks, months, hours, and minutes. The day count updates against today's date and accounts for every leap year in between, so the total is exact.

Can I find the age difference between two people?

Yes. Enter one person's birth date as the date of birth and the other person's birth date as the custom target date, and the result is the age gap between them in years, months, and days.

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