Calculating BMI PRO is free used to determine your ideal weight and BMI. ☆ BMI can be used to determine a person's body size. ☆ The World Health Organization (WHO) has defined this Body Mass Index as the standard for assessing the risks of being overweight. CORPULENCE CURVE: - morbid obesity - severe obesity - moderate obesity - overweight - normal corpulence - thinness - famine BMI is a free trial. The BMI helps determine body size of a person. The World Health Organization (WHO) has defined this body mass index as the standard for assessing the risks associated with overweight. CURVE Figure: - morbid obesity - Severe obesity - Moderate obesity - overweight - Normal weight - thinness - famine