See your BMI, your healthy weight range, and — if you add your waist — a measure that predicts health risk better than BMI alone. Nothing to sign up for.
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Your BMI
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Enter your height and weight to see your result.
- Healthy weight range
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- To reach that range
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- Waist-to-height ratio
- —Add your waist
- Weight category
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What BMI does not tell you
BMI is a screening tool, not a diagnosis. It uses only height and weight, so it can be misleading:
- Muscle counts as weight. Very muscular people can register as “overweight” while carrying little body fat.
- It ignores where fat sits. Fat around the abdomen carries more metabolic risk than fat on the hips or thighs — that’s why we also calculate your waist-to-height ratio. Keeping your waist under half your height is a widely used guide.
- Thresholds differ by ancestry. The World Health Organization notes that people of South and East Asian descent may face increased risk at a lower BMI (around 23) than the standard 25 cut-off.
- Age and sex shift body composition. Muscle mass typically declines with age, so an identical BMI can mean different things at 25 and at 65.
- It says nothing about your labs. Blood pressure, blood sugar, cholesterol and family history all matter — and none of them appear in a BMI.
Categories shown follow the standard CDC/WHO adult ranges. BMI is not validated the same way for children, pregnant people, or competitive athletes.
Educational tool — not medical advice. This calculator cannot diagnose any condition or tell you whether a treatment is right for you. Talk with a qualified clinician about your individual health. ThinfastMD has provided physician-supervised weight loss in Illinois since 1984.
