How much fat are you carrying? Find out if you have a healthy body fat percentage with this calculator. This tool provides: body fat percentage for women, body fat percentage for men, and recommended ideal body fat precentage based on your activity levels. This body fat percentage calculator is based on the body fat algorithms developed by the U.S. Navy, U.S. Army, U.S. Marine Corp and the YMCA. Don't have all these measurements? Click the name to use one of the shorter form Body Fat Calculator formulas, Army, Marines, Navy, or YMCA.