Compute the BMI and its category

Compute the BMI and its category. Made for people and professionals comparing an option, checking a figure or preparing a decision.

Compute the BMI and its category. See a clear result update immediately in your browser, with no account, upload or stored data to worry about.

How to use

Enter your weight in kilograms on the first line, then your height in centimetres on the second line.
Use plain numbers without units attached to the digits to avoid any misinterpretation.
Run the calculation to get the body mass index and its category.
Read the result as a general reference, then clear the fields if you want to compare another measurement.
If you compare several measurements, repeat the calculation the same way to keep a consistent basis.

Example

A person prepares a personal follow-up and enters 70 then 175. They run the calculation to see the BMI and the category shown, then note the result to compare it with a measurement taken a few months earlier.

Input

70
175

Limits and formats

BMI is a general indicator that does not account for muscle mass, age or body shape.
The result does not replace medical advice and should not be used alone to decide on a diet or treatment.
A unit mistake, such as entering centimetres where metres are expected, would completely distort the calculation.
The categories shown are statistical references, not an individual diagnosis.

Where processing happens

The BMI calculation runs locally in your browser. The weight and height you enter stay on your device, with no upload or storage. No personal information is sent to an external service.

Frequently asked questions

Is BMI reliable for an athlete?

Not always. A very muscular person can have a high BMI without excess body fat, because the index does not separate muscle from fat. Treat the result as one reference among others.

Which units should I use?

Weight is expected in kilograms and height in centimetres. Do not mix units and do not paste text into the fields, or the calculation will be wrong.

Can I rely only on the displayed category?

No. The category gives a quick reading, but it does not replace an assessment by a health professional, who considers many other factors.