Army Body Fat Calculator

The US Army body fat calculator uses circumference measurements to estimate body fat percentage. It was developed as a field-expedient method that doesn\

The calculator uses the standard published formula for army body fat. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with centimetres, inches, percentages, watts. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Men: %BF = 86.010 × log₁₀(waist − neck) − 70.041 × log₁₀(height) + 36.76. Each step in the calculation is shown so you can verify the result manually.