You can calculate and track your Body Mass Index with BMI calculator
It help you loss weight or gain weight,you can caculator you BMI value anytime
Info
Body mass index (BMI) is a value derived from the mass (weight) and height of a person. The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m2, resulting from mass in kilograms and height in metres.