BMI calculator
Enter your height and weight in metric or imperial units. You get your BMI, the category it falls in, and the weight range that would put you in the healthy band.
22.9Healthy weight
Healthy weight for this height: 56.7–76.6 kg
BMI 22.9, Healthy weight
BMI is a screening figure, not a diagnosis, and it cannot tell muscle from fat. Talk to a doctor about what it means for you.
Common questions
How is BMI calculated?
Weight in kilograms divided by height in metres squared. Someone 1.75 m and 70 kg has a BMI of 22.9. Imperial entries are converted first, so both unit systems give the same figure.
What do the categories mean?
Below 18.5 is underweight, 18.5 to 25 is the healthy band, 25 to 30 is overweight, and 30 or above is obese. These are the WHO figures for adults.
Why does BMI call a muscular person overweight?
Because it uses only height and weight, and cannot tell muscle from fat. Muscle is denser, so athletes often read as overweight while carrying very little fat.
Does BMI work for everyone?
No. It does not apply to children or teenagers, who need age and sex percentiles, nor during pregnancy. WHO also suggests lower action points of 23 and 27.5 for Asian populations; this calculator uses the standard adult figures.
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