Question

What is BMI and how it can be calculated?

Answer 1

bmi means body mass index used for calculating body mass.
bmi is your weight (kg) over height(cm) squared.

Answer 2

The body mass index (BMI) is a statistic developed by Adolphe Quetelet in the 1900's to calculate body mass. It is not at all related to one's gender or age. Also it uses the same formula for women, men and children. 

English BMI formula
BMI= (Weight in pounds / (Height in inches*Height in inches) )* 703

Metric BMI formula
BMI= (Weight in kilograms / (Height in meters*Height in meters)