Body Fat Calculator Input Your Details Gender Male Female Height (cm) Weight (kg) Age Waist Circumference (cm) To measure your waist circumference: Find the top of your hip bones and the bottom of your rib cage. Wrap a flexible measuring tape around your waist at the midpoint between these two points. Make sure the tape is parallel to the floor and not too tight. Relax your stomach and take the measurement. Neck Circumference (cm) Calculate Clear Your Results Caloric Needs To Lose To Maintain To Gain Weekly Calorie Plan Chart Body Composition Lean Body Mass Body Fat Mass