ToolStack

BMI Calculator

Calculate your Body Mass Index instantly with metric and imperial units.

100% private — everything runs in your browser

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How to Use

  1. 1

    Pick Metric (cm / kg) or Imperial (in / lbs).

  2. 2

    Enter your height and weight.

  3. 3

    Your BMI and category appear instantly, with a visual scale.

Examples

Metric example

Input

170 cm, 65 kg

Output

BMI 22.5 · Normal

Imperial example

Input

70 in (5 ft 10), 154 lbs

Output

BMI 22.1 · Normal

FAQ

What is BMI?

Body Mass Index is a simple ratio of weight to height (kg ÷ m²) used as a screening indicator. It does not distinguish muscle from fat, so very athletic people may read high.

What do the categories mean?

Below 18.5 underweight, 18.5–25 normal, 25–30 overweight, 30 and above obese — following World Health Organization ranges.

How does imperial mode work?

The tool converts your height (inches) and weight (pounds) to metric internally and applies the standard formula.

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