Army Body Fat Calculator
Enter circumference measurements to estimate body fat percentage using the Army Body Composition Program formula. This tool supports both imperial and metric units.
Results
Body fat percentage
19.4%
Compliance
Within baseline Army body fat standards.
Converted measurements
Height 177.8 cm • Neck 40.6 cm • Waist 91.4 cm
How to Use This Calculator
Measure according to AR 600-9
Record neck at the narrowest point below the larynx, waist at the navel (men) or smallest point (women), and hip (women) at the widest buttocks.
Select units and enter data
Switch between imperial and metric units as needed. The calculator internally converts to inches before applying Army formulas.
Review compliance and next steps
Compare the estimated body fat percentage to your age- and sex-specific Army standards. Work with your command if above the limit.
Formula
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
- Measurements must be in inches before applying the formula.
- Use log base 10 (log₁₀) as specified in AR 600-9.
- Age-specific compliance tables determine official pass/fail status.
Full Description
The Army Body Composition Program uses circumference methods when soldiers exceed height/weight tables. Proper technique and consistent measurement timing are essential to produce accurate estimates. This calculator follows the standard equations but does not replace official measurements conducted by trained personnel.
Soldiers who exceed authorized body fat limits enter a body composition program focused on nutrition, fitness, and medical evaluation. Use this tool to track progress between official assessments.
Frequently Asked Questions
What are the official body fat limits?
Limits vary by age and sex (e.g., males 17–20: 20%, females 17–20: 30%). Consult the latest AR 600-9 tables for exact standards.
How accurate is this calculator?
It mirrors the Army formula but cannot account for measurement error. Official assessments by trained personnel remain authoritative.
What if my measurements change daily?
Circumference can fluctuate with hydration and posture. Measure at the same time of day and repeat for consistency.
Does this replace body composition counseling?
No. Use it as a self-check. Always follow your chain of command and unit health advisors for official guidance.