How Old Am I? Age Calculator (Years, Months, Days)

Wondering how old you are? Use this free age calculator to find your exact age from your date of birth in seconds.

Use this age calculator to find your exact age from your date of birth. Enter your birth date and a current or custom reference date to see your age in years, months, and days.

It also works as a how old am I calculator and shows useful age details such as your next birthday, total days lived, and other time totals in one result.

Initial Data

Date of birth

day	month	year

Reference date

day	month	year

Age

Result

Age on selected date: -

Age result

Exact age: - years, - months, - days
Last birthday: -
Next birthday: -
Next birthday countdown: -

Details

Total days: -
Total weeks: -
Total months: -

Advanced

Total hours: -
Total seconds: -

Weekdays

Date of birth: -
Target date: -

Frequently asked questions about the age calculator

How do I calculate my exact age from my date of birth?
Enter your date of birth and use today or any other reference date. The calculator shows your exact age in years, months, and days.

Can I use this as a how old am I calculator?
Yes. It works as a quick how old am I calculator and also shows details like your next birthday and total time lived in other units.

Can I calculate a birth date from a known age?
Yes. In reverse mode, enter an age and a reference date to estimate the date of birth or the possible birth date range, depending on the unit you use.

Can I calculate the date when someone reaches a certain age?
Yes. Enter a date of birth and an age, and the calculator returns the calendar date when that age is reached.