What is BMI?

BMI is a formula based on a value calculated by a person’s height and weight. The value of the calculation will indicate if a person is underweight, normal weight, overweight or suffer from obesity. BMI is an English acronym for Body Mass Index.

What is the meaning of BMI?

The Body Mass Index is used mainly to promote public health by estimating the approximately values of a person’s body fat and to indicate if the person may be at risk of developing lifestyle diseases like diabetes, hypertension and cardiovascular disease.

BMI is also used to help indicate if a person might suffer from underweight and therefore have a greater possibility of developing respiratory diseases, weakened immune system and osteoporosis.

BMI categories:

BMI under 18,5 = Underweight

BMI between 18.5 and 24.9 = Normal range

BMI between 25 and 29.9 = Overweight

BMI over 30 = Obesity

The BMI values are estimated for adults over the age of 17. BMI for children is calculated by a different formula. The BMI values are only indicative and tell us very little about a person’s health condition.

Height (cm):
Weight (kg):

The calculation of BMI

The BMI is defined as the person's bodyweight divided by the square of his or her height. The total will indicate the person's BMI.

Calculation of BMI in kg:

Weight (kg) / (height in meters * height in meters) = Your BMI

Calculation of BMI in lb and ft:

(Weight in lb * 4.88) / (Height in ft * Height in ft) = Your BMI

John weighs 100 kg, and has a height of 183 cm. What is his BMI?

( 100 kg / ( 1.83 m * 1.83 m ) ) = 29.86 BMI

John's BMI is 29,86, which means that he is placed in the category overweight according to the BMI categories stated above.