Body mass index (BMI) is a measure of body fat based on height and weight that applies to both adult men and women.
The International Classification of Adult Underweight, Overweight and Obesity According to BMI. Classification of BMI: [ adopted by the National Institute of Health and World Health Organization for whites, hispanics and blacks]

Underweight — BMI <18. 5 kg/m²
Normal weight — BMI =18.5 to 24.9 kg/m²
Overweight — BMI =25.0 to 29.9 kg/m²
Class I obesity — BMI of 30.0 to 34.9 kg/m²
Class II obesity — BMI of 35.0 to 39.9 kg/m²
Class III obesity — BMI =40 kg/m². This type of obesity is also referred to as severe, extreme, or morbid obesity.

For Asians

Underweight — BMI <18. 5 kg/m²
Normal weight — BMI =18.5 to 22.9 kg/m²
Overweight — BMI =23.0 to 29.9 kg/m²
Class I obesity — BMI of 30.0 to 34.9 kg/m²
Class II obesity — BMI of 35.0 to 39.9 kg/m²
Class III obesity — BMI =40 kg/m². This type of obesity is also referred to as severe, extreme, or morbid obesity

Enter your weight and height using Standard or Metric measures. Click on "Compute BMI" and your BMI will appear in the heart of the figure.