BMI Calculator

Calculate your Body Mass Index (BMI) instantly using weight and height. Switch between metric (kg/cm) or imperial (lbs/inch). See your BMI category and health risk compared with WHO standards.



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BMI Calculator

Adjust weight and height to calculate BMI instantly.

BMI Summary

  • Your BMI: 0
  • Category: N/A
  • Risk: N/A

BMI Categories (WHO)

BMI Range Category Health Risk
< 18.5UnderweightPossible nutritional deficiency and osteoporosis
18.5 – 24.9Normal weightLow risk (healthy range)
25 – 29.9OverweightModerate risk of heart disease, diabetes
30 – 34.9Obesity Class IHigh risk of developing health problems
35 – 39.9Obesity Class IIVery high risk of serious health problems
≥ 40Obesity Class IIIExtremely high risk, severe health issues