Body mass index calculator: Calculate your body mass index

Calculate your body mass index (BMI) based on your height and weight, and learn about your health risks and weight goals. Find out how BMI measures your weight relative to your height, and what it can't tell you about your body fat, age, sex, and more. Quickly calculate your Body Mass Index (BMI) with our free tool. Understand BMI ranges and what they mean for your health. Calculate your body mass index (BMI) and find out your weight category based on your height and weight. Use metric or US units and see BMI formulas, charts and examples. BMI Calculator The free Body-Mass-Index calculator gives the BMI value and categorizes BMI based on the WHO for men and women.