Use a body fat scale or smart scale
Use skinfold calipers to measure body fat at specific sites
Use a tape measure and the U.S. Navy body fat formula
Use bioelectrical impedance analysis devices
Use DEXA scan results if available
Use hydrostatic weighing results if available
Use air displacement plethysmography results if available
Calculate body fat percentage from the measured body fat mass and total body weight
Body fat percentage = (fat mass ÷ total body weight) × 100