BMI Calculator
Calculate your Body Mass Index from height and weight and see the adult weight category.
How it works
BMI = weight (kg) ÷ height (m)². Adult categories (WHO): under 18.5 underweight, 18.5–24.9 healthy, 25–29.9 overweight, 30 and above obesity.
BMI is a screening number, not a diagnosis. It does not account for muscle, age or body shape, and these categories do not apply to children or pregnant women.
Frequently asked questions
Is BMI accurate for children?
No. Children need age- and sex-specific BMI charts. Ask a health worker.