FREE TOOL · ON YOUR DEVICE
BMI calculator (body mass index)
Enter your height and weight, in metric or imperial units, and get your BMI with the World Health Organization category and the weight range that gives a normal BMI for your height. It is a rough estimate for adults: it does not replace an assessment by a healthcare professional.
- Free with an account
- Metric and imperial
- WHO categories
- Choose the units
- Enter height and weight
- Read your BMI
HOW TO USE IT
Three steps.
Choose the units
Centimeters and kilograms, or feet, inches and pounds.
Enter height and weight
Decimals are fine. The result updates as you type.
Read your BMI
You will see the value, your WHO category and the healthy weight for your height.
NEXT STEP
Keep going with these tools
BMI calculator: common questions
How is BMI calculated?
Weight in kilograms divided by height in meters squared. For example, 70 kg and 1.75 m give a BMI of 22.9.
Who does it not apply to?
Under-18s, who use percentiles by age, pregnancy, and very muscular or older people, for whom BMI can mislead. Some Asian populations use other cut-off points.
Does it replace a consultation?
No. BMI does not measure fat or where it is stored. It is a reference: your healthcare professional will assess your case.
Is my data sent to a server?
No. The numbers, dates and names you type are calculated in your browser and are not sent to Cocuyo or to any third party.
Is it really free?
Yes. You can try it before signing up; to keep using it, we ask for a free account, with no subscription. It uses no credits and does not count toward your 30 welcome uses: it has no usage cap.
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