# BMI Calculator

## Calculate your BMI or weight to reach a certain BMI

## Weight categories as degined by WHO

BMI interval |
WHO weight category |

<15.0 | Very severaly underweight |

15.0-16.0 | Severaly underweight |

16.0-18.5 | Underweight |

18.5-25 | Normal (healthy weight) |

25-30 | Overweight |

30-35 | Obese Class I |

35-40 | Obese Class II |

>40 | Obese Class III |

Note that the intervals stated above are for adult people and are only valid as statistical categories.

## How to use the BMI calculator

Type your height and weight in the field above and your BMI value will automatically show. BMI (Body Mass Index) is a measure of underweight vs overweight. The calculation is based on a person's height and weight in the following formula: weight/height^{2}. If you want to reach a certain BMI and wonder what weight is required to do so, you simply select "Calculate weight" and type in your height and BMI target.

## More on BMI

Wikipedia:http://en.wikipedia.org/wiki/Body_mass_index

WHO: http://apps.who.int/bmi/index.jsp