BMI or Body Mass Index, is used to compare your weight to your height. The index determines your health risk. The ideal BMI is in the range of 18.6-24.9. Notice that even if you are considered underweight, your health risk is elevated.

BMI

Category

Health Risk

Under 18.5

Underweight

Elevated

18.6-24.9

Normal

Average

25-29.9

Overweight

Elevated

30-34.9

Obesity Class I

High

35-39.9

Obesity Class II

High

Over 40

Obesity Class III

High