Body Mass Index (BMI) formulas
Body Mass Index is a calculation that takes into consideration both a person's body weight and height to determine whether they are underweight, overweight, or at a healthy weight. It can be calculated in inches and pounds (in the United States), or meters and kilograms (in countries that use the metric system).
In inches, the formula looks like this:
(height in inches) x (height in inches)
A person who weighs 180 pounds and is 5 feet 8 inches tall has a BMI of 27.4.
(68 inches) x (68 inches)
In meters, the formula looks like this:
(height in meters) x (height in meters)
(1.905 m) x (1.905 m)
- Underweight = <18.5
- Normal weight = 18.5-24.9
- Overweight = 25-29.9
- Obesity = BMI of 30 or greater
Tags: Health BMI Body Mass Index