What is a Healthy Weight for You? Calculating your BMI This assessment is designed to help you make educated decisions about your weight and how it relates to health risks. The calculator below will figure your BMI, or body mass index. BMI is a better measure of body fat and its potential impact on health than your bathroom scale or the weight-for-height tables. Calculate your BMI using our online calculator below. Standard (United States):       Metric (World): Height: 4 5 6 ft 0 1 2 3 4 5 6 7 8 9 10 11 in Weight:  lbs         Height:  meters Weight:  kg