Army Body Fat Calculator (Tape Test Estimate)

Military body composition assessments have long used a circumference (tape) method rather than calipers or scales, because a cloth tape is cheap, portable and quick. The approach estimates body fat from the relationship between your waist and neck, scaled by height — the same statistical basis as the U.S. Navy method. It needs no special equipment, which is why it became the field standard and why home versions of it are so widely searched for. Note that the U.S. Army has since moved to a single abdominal-circumference (one-tape) measurement for its own official assessment; the neck-and-waist estimate here uses the widely recognised Navy circumference formula, so treat it as a general home estimate rather than a replica of the current Army test.

Measure your neck just below the larynx and your waist horizontally at the navel; women also measure the hip at its widest point. Keep the tape level and snug without compressing the skin, stand relaxed, and take two or three readings and average them. Consistency matters more than perfection — measuring under the same conditions each time is what makes a change trustworthy. Enter the numbers above to see your estimated percentage and mass breakdown.

If your estimate shows more fat than you’d like, the next step is energy balance. Find the calories your body burns in a day with the TDEE Calculator, then set a sustainable gap with the Calorie Deficit Calculator. To compare the tape estimate with the BMI-based method, return to the full Body Fat Percentage Calculator.