BMI Calculator

Calculate your Body Mass Index (BMI) in kg/cm or lb/ft-in, see your category and a healthy weight range.

Processed on your device Works offline Free, no sign-up

How to use BMI Calculator

Is BMI accurate for everyone?

BMI is a screening tool. It does not account for muscle mass, age or body shape — consult a doctor for advice.

Is BMI Calculator free?

Yes. BMI Calculator is completely free, with no sign-up, no watermark and no usage limits.

Is my data uploaded to a server?

No. BMI Calculator runs entirely in your browser. Your files and text never leave your device.

Does it work offline?

Yes. After Red Cat Tools has loaded once, this tool keeps working without an internet connection. You can also install Red Cat Tools as an app.

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