BMI calculator

Compute body mass index in metric or imperial units.

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How to use BMI calculator

Choose metric (cm, kg) or imperial (ft/in, lb). Enter your measurements. The calculator shows BMI and a category band. It does not account for muscle mass, pregnancy, or age — talk to a clinician for health decisions.

Enter height and weight to get BMI and the standard WHO category. BMI is a screening number, not a diagnosis.

Also searched as bmi calculator, body mass index, bmi chart. All processing for this tool happens in your tab unless labeled otherwise.

Questions

BMI formula?

kg / m². Imperial inputs are converted first.

Is BMI accurate?

It is a population screening tool. Athletes and some body types are misclassified.

Child BMI?

Use a pediatric chart. This tool is for adults.

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