BMI (Body Mass Index) Calculator

Enter weight: kg lbs

Enter height: cm in

Be sure the weight and height units are correct and click Calculate:

BMI is:
Interpreting BMI results

A BMI above the 85th percentile is considered overweight.

A BMI above the 95th percentile is considered obese.

To give you an idea of what BMIs are by age and sex, look at the tables below.
You can download a complete BMI percentile chart (in PDF format) for boys ages 2-20 and for girls ages 2-20.

For boys: For girls:
Age85th %ile95th %ile
10 years old19.422
12 years old2124.1
15 years old23.526.9
18 years old25.729
20 years old2730.6
Age85th %ile95th %ile
10 years old2023
12 years old21.825.2
15 years old2428
18 years old25.730.4
20 years old26.531.8

Last updated 06/27/09

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