How accurate is this age calculator?

It calculates your exact age down to the day, accounting for leap years.

Can I calculate age between two past dates?

Yes, set both the birth date and the 'as of' date to any date.

Any date from year 1 to year 9999 is supported.

Calculations are based on calendar dates, not specific times.

Yes, the calculator shows your next birthday countdown.

birthday countdown

Calculate exact age from date of birth in years, months, days, hours, and minutes.

Date of Birth

Age as of

Select your date of birth using the date picker.

Choose today or another date to calculate age as of.

See exact age in years, months, days, hours, and minutes.

Calculate your Body Mass Index (BMI) using height and weight. Supports metric and imperial units.

Calculate percentages easily: find X% of Y, percentage change, percentage difference, and more.