What is BMI?
Body Mass Index estimates whether your weight is healthy for your height. It's a quick screening tool, not a diagnosis, and doesn't account for muscle mass.
BMI categories
- Under 18.5 — Underweight
- 18.5–24.9 — Normal
- 25–29.9 — Overweight
- 30+ — Obese
Frequently asked questions
Is BMI accurate for athletes?
Not always — muscle weighs more than fat, so very muscular people can read high. Use body fat % too.
How is BMI calculated?
Weight (kg) divided by height (m) squared.