BMI Calculator
Body Mass Index with WHO category and healthy-weight range. Free, private, no sign-up — runs in your browser.
BMI Calculator
Calculate your Body Mass Index from height and weight in metric or imperial units, see your WHO category, and get the healthy weight range for your height.
About this BMI Calculator
BMI is weight in kilograms divided by height in metres squared, with WHO adult categories: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obesity. The healthy-weight range shows what weight would put your BMI between 18.5 and 24.9 for your height.
BMI is a screening measure, not a diagnosis — athletes with high muscle mass can score "overweight" while being very fit. Consult a healthcare professional for personal advice.
Frequently asked questions
Is BMI accurate for everyone?
What formula is used?
Are the categories different for children?
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