Army Body Fat Calculator

Sex

Units

Metric values are converted automatically for the calculation.

Height (in)

Neck circumference (in)

Waist circumference (in)

Male: measure at navel. Female: at the natural waist (narrowest point).

Army Body Fat – Quick Cheat Sheet

Method: Circumference (tape) equations with base-10 logarithms.
Male: BF% = 86.010×log10(waist − neck) − 70.041×log10(height) + 36.76
Female: BF% = 163.205×log10(waist + hip − neck) − 97.684×log10(height) − 78.387
Units: Height/neck/waist/hip are in inches for the equations. Metric (cm) is converted: in = cm ÷ 2.54.
Measurement tips:
- Height: barefoot, standing straight.
- Neck: just below larynx (slightly downward tape angle).
- Waist: males—at navel; females—at the natural waist (narrowest point).
- Hip (females): fullest point of the buttocks.
Validation: For males, waist > neck; for females, waist + hip > neck.
Note: This is an estimate used for fitness screening; results can differ from clinical methods.

Edge cases & notes

Large neck values can reduce estimated BF%; ensure correct neck placement.
Avoid compressing soft tissue with the tape; keep it horizontal and snug, not tight.
Re-measure 3× and average if possible for better consistency.