This is a tool that calculates your body mass index (BMI) from your height and weight, entered in the chosen units. This can be used to determine which weight category you belong to according to international norms, e.g. the World Health Organization regards a BMI of less than 18.5 as underweight and over 25 as overweight, for an adult.

However, since there are regional variations in these thresholds, the tool provides an additional calculated value of body mass index prime using the entered upper limit BMI (see below).

For the calculation of body mass index, it is necessary to supply the following information:

• Your height in metres, centimetres or feet and inches.
• Your weight in kilogrammes, pounds or stone.

For the calculation of body mass index prime, it is also necessary to supply the following information:

• The upper limit BMI, which has a standard value of 25, but can be configured to a more appropriate regional value, e.g. 23 is considered a more suitable value for Asian populations.

Associated tool link: http://www.coggit.com/tools/body_mass_index_calculator.html