BMI Calculator
Free BMI calculator. Enter height and weight in metric or imperial to get your Body Mass Index, weight category, and the healthy weight range for your height.
| Healthy weight for your height | 57 kg (125 lb) – 76 kg (169 lb) |
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BMI screens weight-for-height only — it can't tell muscle from fat, so very muscular people read high. Treat it as a rough guide, not a diagnosis.
⚕️ This is an educational estimate, not medical advice. Formulas are population averages and can't account for your full health picture — talk to a doctor or registered dietitian before making decisions about diet, weight or training.
How this calculator works
Body Mass Index is your weight in kilograms divided by the square of your height in metres (BMI = kg ÷ m²). The standard adult bands are: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, and 30 or higher obese.
BMI was designed for populations, not individuals. It doesn't account for muscle, bone density, sex or age, so use it alongside waist measurement and how you feel — not on its own.