Body Mass Index (BMI) Calculator

Body Mass Index

BMI Calculator: Calculate your Body Mass Index (BMI) easily. Estimate your healthy body weight for a healthier lifestyle.

The body mass index (BMI) is calculated with the following formula: BMI = weight(kg) / height(m)². If pounds and inches are used, a conversion factor of 703 (kg/m²)/(lb/in<2) must be applied.

The new BMI. In 2013 Lloyd N. Trefethen, professor of University of Oxford, proposed a new formula to calculate the BMI of a person: BMI = 1.3 x weight / height^2.5. The same conversion factor applies for pounds and inches.

Category	BMI range
Starving	< 16
Underweight	16 - 18.5
Normal	18.6 - 25
Overweight	25.1 - 30
Obese	30.1 - 35
Clinically Obese	35.1 - 40
Morbidly Obese	> 40.1

» Body Mass Index

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Body Mass Index