BMI Calculator
Body mass index from height and weight, metric or imperial.
Input
This tool runs entirely in your browser. The data you paste or load is never uploaded.
Result
Enter your input, then run the tool.
About this tool
Calculates body mass index from height and weight in metric or imperial units, shows the WHO adult category and the weight range that corresponds to a BMI between 18.5 and 24.9 for the same height.
How to use it
- Choose metric or imperial units.
- Enter your height and weight.
- Read the BMI, its category and the healthy weight range.
Frequently asked questions
Is BMI accurate for everyone?
No. It ignores muscle mass, age and body shape, and does not apply to children or pregnancy. Treat it as a screening figure and ask a health professional for advice.
How is BMI calculated?
Weight in kilograms divided by height in metres squared. Imperial values are converted to metric first.
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