How to Calculate Body Fat, Height and Weight

Calculating your Body Mass Index (BMI) is a good way to find out whether you are underweight, at just the right weight or overweight. BMI is calculated using your height and weight, and although it does not measure body fat directly, the Centers for Disease Control and Prevention says that BMI "correlates to direct measures of body fat." You can quickly calculate your own BMI by first measuring your height and weight, and then use your BMI to figure out your body fat percentage.