Army Body Fat Calculator
The US Army uses a circumference-based method. For men: body fat % = 86.01 × log10(waist − neck) − 70.041 × log10(height...
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How It Works
The US Army uses a circumference-based method. For men: body fat % = 86.01 × log10(waist − neck) − 70.041 × log10(height) + 36.76. For women the formula adds hip measurement. Results are compared against age-based Army standards.
Quick Reference
Male standard <30
Army regulation
Max varies by age
Male 17-20yr
Army standard
Max 20% body fat
Female 17-20yr
Army standard
Max 30% body fat
Tips & Shortcuts
Measurements must be taken at the correct anatomical points: neck at its narrowest, waist at navel level for men, smallest point for women.
Each measurement is taken 3 times and averaged. Stand relaxed — no sucking in.
If you are close to the limit, retesting after slight weight loss often yields significantly different tape results due to how the formula works.
Common Mistakes
Measuring at incorrect body points
Waist for men is measured horizontally at the navel, not the narrowest point. Women measure at the narrowest abdominal point.
Taking only one measurement
Army regulation requires three measurements averaged together. Single measurements are less accurate.
Frequently Asked Questions
Standards vary by age and gender. Men 17–20: max 20%; 21–27: max 22%; 28–39: max 24%; 40+: max 26%. Women 17–20: max 30%; 21–27: max 32%; 28–39: max 34%; 40+: max 36%.
Neck and waist are measured for men; neck, waist, and hips for women. Each measurement is taken three times and averaged. The tape must be firm but not compressing tissue.
Failing results in enrollment in the Army Body Composition Program (ABCP). Two tape test failures within 12 months can lead to separation from service.
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