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Calculators » Health » Body Mass Index

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate **body mass index (BMI)** given height and weight values. Alternately, you can determine ideal body weight, given your height.

If you use imperial measurement system, use these unit converters for converting to metric equivalent: weight, height

Android: Use this bmi calculator offline with our all-in-one calculator app.

BMI is a measure of fitness and indicates if you are under-weight, over-weight or of normal weight. The formula for BMI is:

BMI = Weight (in kg) / [Height (in m) * Height (in m)]

The body mass index is simply your body weight (in kilograms) divided by your height (in metres) squared.

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Classification | Cut-off points BMI(kg/m^{2}) |

Underweight | <18.50 |

Severe thinness | <16.00 |

Moderate thinness | 16.00 - 16.99 |

Mild thinness | 17.00 - 18.49 |

Normal range | 18.50 - 24.99 |

Overweight | >=25.00 |

Pre-obese | 25.00 - 29.99 |

Obese | >=30.00 |

Obese class I | 30.00 - 34.99 |

Obese class II | 35.00 - 39.99 |

Obese class III | >=40.00 |

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