Calculate your Body Mass Index with metric or imperial units. Visual scale, health categories, ideal weight range, and health tips.
Enter your height and weight to calculate your Body Mass Index and see which WHO category it falls into. Both metric (kg/cm) and imperial (lb/in) units are supported.
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You want a quick BMI and category from metric height and weight.
Input
weight 75 kg · height 1.80 m
Result
BMI = 75 / 1.80² = 23.1 → Normal (18.5–24.9)
BMI is mass divided by height squared, and the result is placed in the standard WHO band so the number has meaning. The tool accepts metric or imperial and notes that BMI is a population screen, not a diagnosis, useful framing rather than a bare figure.
Enter your height and weight to calculate your Body Mass Index and see which WHO category it falls into. Both metric (kg/cm) and imperial (lb/in) units are supported.
Get a quick snapshot of where your weight stands relative to standard ranges.
Monitor BMI changes over time as part of a broader health routine.
BMI is a useful screening tool but does not account for muscle mass, bone density, or fat distribution. Consult a healthcare provider for a complete assessment.
The WHO classifies a BMI of 18.5–24.9 as normal weight.
Every calculation runs locally in your browser. Your numbers and expressions are not transmitted or stored.