BMI estimates whether your weight is in a healthy range for your height. It is a population-level screen, not a diagnosis, and can misclassify very muscular people.
BMI Calculator
Body Mass Index and the standard weight category.
How it works
BMI = weight(kg) ÷ height(m)²
Frequently asked questions
What is a healthy BMI?
For most adults, 18.5–24.9 is the normal range.
Accurate for athletes?
Not always — muscle is dense, so athletes can show a high BMI with low body fat.