BMI formula

The Body Mass Index (BMI) formula was developed by Belgium statistician Adolphe Quelet(1796-1874), and was known as the Quetelet Index. BMI is also referred to as 'body mass indicator'. BMI is an internationally used measure of obesity.

How to calculate BMI (BMI formula) - for users who wish to manually calculate BMI we have provided a bmi formula for both imperial & metric measurements.
Body mass index calculation is very straightforward. Calculating body mass index requires only two measurements, height & weight.

Imperial BMI Formula
The imperial bmi formula accepts weight measurements in pounds & height measurements in either inches or feet.1 foot = 12 incesinches² = inches * inches

BMI = (weight in pounds * 703 ) / height in inches²

Metric Imperial BMI Formula
The metric bmi formula accepts weight measurements in kilograms & height measurements in either cm's or meters.1 meter = 100cmsmeters² = meters * meters

BMI = weight in kilograms / height in meter²


Calculate BMI & Find Weight Status
Table: BMI Weight Status Categories

Weight Status
Below 18.5 Underweight
Normal 18.5 -24.9
Overweight 25 - 29.9
Obese 30 & Above

If you have calculated BMI use the table above to find your weight status. Different nations & organizations use different BMI ranges to classify weight status. Our table is in keeping with the internationally recognized, US Department of Health & Human Services weight status categories.


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