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Enter your weight and height to instantly find your Body Mass Index (BMI), your category, and the healthy weight range for your height.
Body Mass Index is a simple number from your weight and height: weight in kilograms divided by height in metres squared. It gives a quick idea of whether your weight is in a healthy range.
Below 18.5 is underweight, 18.5 to 24.9 is normal (healthy), 25 to 29.9 is overweight, and 30 or above is obese.
BMI = weight (kg) / height (m) x height (m). For example, 70 kg at 1.75 m gives 70 / 3.0625 = 22.9, which is normal.
Not always — very muscular people can score high even with little body fat, because muscle weighs more than fat. BMI is a general guide, not a full health test.
The formula is the same for adults of all ages, but for children and teenagers BMI is judged differently (against growth charts), so this calculator is meant for adults.
No — BMI is only a screening number. For a full health check, talk to a doctor, especially before starting a diet or exercise plan.
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