⚖️ BMI Calculator

Calculate body mass index from your height and weight. This tool is for adults.

General information only. This tool is not medical advice and cannot diagnose anything. Talk to a doctor or registered dietitian about your health or diet.

How to use the BMI Calculator

  1. Choose metric or imperial units.
  2. Enter your height and weight.
  3. Read your BMI and category.

Examples

  • 70 kg at 175 cm gives a BMI of 22.9, in the healthy range.

Formula and method

BMI = weight in kg ÷ (height in m)². Adult WHO ranges: under 18.5 underweight, 18.5 to 24.9 healthy, 25 to 29.9 overweight, 30 or above obesity range. BMI does not measure body fat or muscle and can be misleading for some people.

Frequently asked questions

Is BMI accurate for everyone?

No. It is a screening number only.

Is this for children?

No. It is for adults.

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