The Scratch cat will now calculate your BMI (Body Mass Index) Let's see if you are healthy! Generally for Men:- 18 - 20= Underweight 21 - 25= Healthy 26 - 29= Overweight 30 - 38= Obese Generally for women:- 17 - 20= Underweight 21 - 25= Healthy 27 - 30= Overweight 31 - 40= Obese