Body mass index, or BMI, is a way of describing height and weight in one number that can help tell if someone's weight is healthy.
To figure out your BMI, just use this math formula: Multiply your weight in pounds by 703 and divide it by your height (in inches) squared.
Obesity in adults is defined as having a BMI of 30.0 or above. The other ranges are:
- Overweight = 25.0 to 29.9
- Normal weight = 18.5 to 24.9
- Underweight = under 18.5