Circumference method calculator
Formula
Male: 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76
Female: 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387
Interpretation
The result is an estimate from tape measurements, not a medical diagnosis. Use consistent measuring technique for better comparisons over time.
How it works
The US Navy method estimates body fat from circumference measurements rather than from a scale or scan. It uses logarithms of body measurements, so unrealistic combinations can produce unstable results.
Lean body mass is calculated from your estimated body fat and total body weight. This gives a rough idea of how much of your body weight is not fat tissue.
Measure at the same time of day, with the tape level and snug but not compressing the skin. This tool is for education and tracking trends only, not for medical decision-making.