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BMI Calculator
Calculate Body Mass Index

BMI =

The BMI is an indicator of leanness or corpulence based on one's height and weight. It was designed by Adolphe Quetelet around 1850, and has been traditionnally used to classify a person as underweight, normal weight, overweight, or obese.

The World Health Organization indicates the following BMI classification values for adults (men and women) over age 18:

CategoryBMI rangeRisks
Severe Thinnessunder 16Severe nutritional deficiency
Moderate Thinness16 - 17Nutritional deficiency and osteoporosis
Mild Thinness17 - 18.5Nutritional deficiency
Normal18.5 - 25Low risk (healthy range)
Overweight25 - 30Increased for heart disease, stroke, diabetes, etc.
Obese Class I30 - 35High risk for heart disease, stroke, diabetes, etc.
Obese Class II35 - 40Severe health risks
Obese Class IIIabove 40Life threatening risks