BMI calculator
Calculate your body mass index and see its adult screening category.
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How does it work?
Step 1Enter your weight in kilograms.
Step 2Enter your height in centimetres.
Step 3Review the BMI and adult category.
BMI = kg / (cm / 100)²
Frequently asked questions
Adults aged 20 and over, excluding pregnancy. Children need age- and sex-specific growth charts.
No. BMI is a screening tool and does not directly measure body fat. A health professional can interpret your result.
Below 18.5: underweight; 18.5 to below 25: healthy weight; 25 to below 30: overweight; 30 or higher: obesity.