Body Mass Index is a statistical measure of the body fat scaled according to your ideal height and ideal weight. It has five categories which are listed in the table below.

Category | BMI range |

Starvation | less than 15 |

Underweight | from 15 to 18.5 |

Normal | from 18.5 to 25 |

Overweight | from 25 to 30 |

Obese | greater than 30 |

Hence from the table BMI should always be less than 25.

Body mass index can be calculated in three units as SI, US and UK units.

BMI = weight(kg) / height^{2}(m^{2})

BMI = 703 X weight(lb) / height^{2}(in^{2})
**where,**
1kg = 2.2lbs.1cm = 0.39inches.

BMI = 6.35 X weight(kg) / height^{2}(m^{2})

Consider a person's weight as 75kg and height as 157cm. Calculate BMI for the person.

SI Units = weight(kg) / height^{2}(m^{2})

= 75 / (15.7)^{2}
= 30kg/m^{2}
US Units = 703 X (weight(lb) / height^{2}(in^{2}))
= 703 X ((75X2.2) / (157X0.39)^{2})
= 30lb/in ^{2}
UK Units = 6.35 X weight(kg) / height^{2}(m^{2})
= 6.35 X (75 / (15.7) ^{2} )
= 193kg/m^{2}
Hence your category will be Obese.

This tutorial will help you dynamically to find the BMI.

- >> BMI Chart