BMI Calculator (Body Mass Index)

Your Height feet inches
Your Weight pounds

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What Is BMI? (Body Mass Index)

The body mass index (BMI) is a heuristic proxy for human body fat based on an individual's weight and height.

BMI does not actually measure the percentage of body fat. It was invented between 1830 and 1850 by the Belgian polymath Adolphe Quetelet during the course of developing "social physics".

Body mass index is defined as the individual's body weight divided by the square of his or her height. The formulae universally used in medicine produce a unit of measure of kg/m2. BMI can also be determined using a BMI chart, which displays BMI as a function of weight (horizontal axis) and height (vertical axis) using contour lines for different values of BMI or colors for different BMI categories.

A person is underweight if BMI < 18.5.

A person has normal weight if BMI ranges from 18.5 to 24.9.

A person is overweight if BMI ranges from 25 to 29.9.

A person is obese if BMI ranges from 30 to 34.9.

A person is very obese if BMI ranges from 35 to 39.9.

A person is extremely obese if BMI >= 40.

Do you want to lose weight? Click here to calculate your daily estimated energy requirement (EER). If you eat less than EER, you are going to lose weight.

Click here to calculate your risk of diabetes, hypertension, and cariovascular diseases using your BMI and waist circumference.
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