BMI Calculator
Calculate your Body Mass Index in metric or imperial units. BMI is a useful screening tool but doesn't distinguish between muscle and fat — use it alongside other measurements.
Understanding BMI
The BMI Formula
BMI = weight (kg) ÷ height² (m). For example, someone weighing 70 kg at 175 cm has a BMI of 70 ÷ 1.75² = 22.9, which falls in the healthy range.
BMI Categories
Under 18.5 is Underweight. 18.5–24.9 is Healthy Weight. 25–29.9 is Overweight. 30 or above is Obese. These ranges apply to adults aged 18 and over.
Limitations of BMI
BMI doesn't distinguish between muscle and fat, and doesn't account for age, sex, or ethnicity. Athletes often score 'overweight' despite being in excellent health. Use it alongside other measurements for a fuller picture.
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