BMI Calculator
Body mass index from your height and weight, with the WHO category.
—BMI
—Category
How it's calculated
BMI is your weight in kilograms divided by your height in metres squared (kg/m²). The World Health Organization bands are: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese. BMI is a population screening statistic and doesn't distinguish muscle from fat — read our full guide to BMI for its blind spots. Not medical advice.