US Navy formula — uses tape-measure inputs at neck, waist, and (for women) hip. BMI alone can mislead in muscular builds; this gives a better adiposity read.
Estimated body fat
34.1%
Excess
US Navy formula is accurate within ±3% for most adults. DEXA / BIA remain more reliable for tracking changes precisely.
Body-fat calculator — U.S. Navy method (GLP-1 baseline)