The US Navy body fat method estimates body fat from a few tape measurements, no calipers or scans needed. Enter your numbers for an instant estimate with category and fat mass.
US Navy tape measure method. Use a soft tape, snug not tight.
Enter height, neck, waist, and hip if female.
Developed for military fitness testing, it uses logarithmic relationships between circumference sites: neck, waist, and hips for women. Because waist tracks abdominal fat closely, the formula estimates total body fat within about 3 to 4 percent of lab methods for most people.
Measure in the morning, tape snug against skin without compressing, waist at the narrowest point, neck below the Adam's apple, hips at the widest point for women. A 1 cm error at the waist shifts the result by roughly 1 percent.