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Enter your height and weight
Underweightbelow 18.5
Normal weight18.5 – 24.9
Overweight25 – 29.9
Obese30 and above
Height and weight → Body Mass Index and category.
About this calculator
BMI is calculated as weight (kg) ÷ height (m)², or 703 × weight (lb) ÷ height (in)² in imperial units.
It's a quick screening tool, not a diagnosis — it doesn't distinguish muscle from fat, so very muscular people can show a higher BMI without carrying excess body fat. The standard categories are under 18.5 (underweight), 18.5–24.9 (normal), 25–29.9 (overweight), and 30+ (obese).