BMI Calculator

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How to calculate your BMI

Enter your height and weight in metric (cm/kg) or imperial (ft/lb) units, and your Body Mass Index (BMI) plus its category (underweight, normal, overweight, obese) is calculated instantly. The result follows the World Health Organization's (WHO) standard BMI ranges.

What is it useful for?

  • Checking whether your body weight is in a healthy range for your height
  • Tracking your weight loss or weight gain goals
  • Getting a quick reference before talking to a doctor or dietitian
  • Comparing how your BMI changes over time

Frequently asked questions

Is the BMI calculator free? Do I need an account?

The tool is completely free and requires no account.

Does BMI alone tell me about my health?

BMI gives a general indicator but doesn't account for factors like muscle mass, age or sex. For a full assessment, it's best to consult a healthcare professional.

Is the height and weight I enter stored anywhere?

The calculation happens entirely in your browser; your data is never sent to a server.