Body Mass Index Calculator

Your BMI Result


Body Mass Index

Weight Category

The table below shows the category of BMI.

BMI Weight Category
Less than 18.5 Underweight
18.5 to 24.9 Healthy Weight
25 to 30 Overweight
30 to 35 Obese
35 to 40 Severely Obese
40 and over Morbidly Obese

What is BMI?

Your BMI is a measurement of your body weight based on your height and weight. Although your BMI does not actually "measure" your percentage of body fat, it is a useful tool to estimate a healthy body weight based on your height. Due to its ease of measurement and calculation, it is the most widely used diagnostic indicator to identify a person's optimal weight depending on his height. Your BMI "number" will inform you if you are underweight, of normal weight, overweight, or obese. However, due to the wide variety of body types, the distribution of muscle and bone mass, etc., it is not appropriate to use this as the only or final indication for diagnosis.

Body Mass Index Formula

The formulas to calculate BMI based on two of the most commonly used unit systems:

BMI = weight(kg)/height2(m2) (Metric Units)

BMI = 703·weight(lb)/height2(in2) (U.S. Units)