Get Your Numbers: BMI, WHR, Somatotype Calculators


What Is BMI?

The body mass index calculator measurement is the calculation of your body weight in relation to your height and is commonly used as an indicator of whether you might be in a risk category for health problems caused by your weight. Using a BMI calculator such as the one on this page, you enter your weight and height measurements.

Below are the BMI classifications for men and women established by the World Health Organization (WHO) and endorsed by leading organizations of health professionals. Reference: The practical guide: identification, evaluation, and treatment of overweight and obesity in adults – National Institutes of Health (NIH), National Heart, Lung, and Blood Institute (NHLBI).

Body Mass Index (kg/m2) Classification
less than 18.5: underweight
18.5 – 24.9: normal weight
25 – 29.9: overweight
30 – 34.9: class I obese
35 – 39.9: class II obese
40 upwards: class III obese

Get Your Waist-Hip Ratio

What does the WHR measurement mean?

Female Male Health Risk
0.80 or lower 0.95 or lower Low health risk
0.81 to 0.84 0.96 to 1.0 Moderate risk
0.85 or higher 1.0 or higher High risk

Women with a ratio of 0.8 or below, and men at 0.95 or below are pear shaped. People with pear shaped bodies are in the lower risk category for health problems such as heart disease, type 2 diabetes and some forms of cancer.

Women with a ratio of 0.85 or above, and men with a ratio of 1.0 or above are considered to have apple shaped bodies. Fat tends to gather around the middle, and apple shaped bodies face a high risk of type 2 diabetes and heart disease, and even some types of cancer.