BMI Formula

The Body Mass Index is calculated by the following formula:

body weight in Kilogramm divided by body height in Meter to the second
           or
BMI = x KG / (y M * y M)

  x=body weight in KG
  y=body height in M

Example for 175 cm size and 70 kg weight:
  BMI = 70 / (1,75 * 1,75) = 22,86

The resulting value is Kilogramm per Meter by the second or short KG/M². In most cases this can be left. There is no really sense in this, because humans are no mathematical square. More about this also in BMI Criticism.

Tip for calculator:

If you try to use the formula in a hand calculator you get some problems. But with a little change it is be simple. So you can use:
  weight / size / size
Example for 70 kg weight and 1,75 m size:
  70 / 1,75 / 1,75 = 22,86

Step by step:

1. weight in kg
2. / (divided by)
3. size in m
4. / (divided by
5. size in m
6. =