What is BMI?
Body mass index relates your weight to your height: BMI = weight (kg) / height (m)².
WHO categories
| BMI | Category |
|---|---|
| Under 18.5 | Underweight |
| 18.5 to 24.9 | Normal weight |
| 25 to 29.9 | Overweight |
| 30 or more | Obesity |
BMI does not tell muscle from fat. Talk to your doctor.
Frequently asked questions
What is a normal BMI?
Between 18.5 and 24.9.
Does BMI work for athletes?
It can be misleading because it does not tell muscle from fat.
Does it work for children?
No, children use age-based charts.
Does it replace a medical visit?
No.
How is BMI calculated?
Weight in kg divided by height in meters squared.