Army Body Fat Calculator — Multi-Site Tape (Archive, Pre-June 2024)
From the publication of AR 600-9 until June 2024, the Army estimated body-fat percentage using circumference measurements at three sites: neck, abdomen (or waist for females), and hip (females only). The formulas are log10-based and appear in Figures B-1 and B-2 of AR 600-9 Appendix B.
This calculator is preserved for reference only. Soldiers with older ABCP records, appeals referencing historical assessments, and military historians may need to compute or interpret a pre-2024 multi-site result.
Multi-site tape calculator (archive)
Reminder: this method was replaced in June 2024, then by WHtR in July 2026. Informational only — not an official ABCP determination.
Formulas quoted verbatim from AR 600-9 Appendix B, Figures B-1 (male) and B-2 (female). All measurements in inches. Verify against the original regulation PDF before relying on output.
The formulas
Male: %BF = 86.010 × log10(abdomen − neck) − 70.041 × log10(height) + 36.76 Female: %BF = 163.205 × log10(waist + hip − neck) − 97.684 × log10(height) − 78.387
Formulas quoted verbatim from AR 600-9 Appendix B, Figures B-1 (male) and B-2 (female). All measurements in inches. Verify against the original regulation PDF before relying on output.
Worked examples (independently checked)
- Male, 70 in height, 15 in neck, 36 in abdomen → %BF = 86.010 × log10(21) − 70.041 × log10(70) + 36.76 = 113.7241 − 129.2325 + 36.76 = 21.25%
- Female, 65 in height, 13 in neck, 30 in waist, 40 in hip → %BF = 163.205 × log10(57) − 97.684 × log10(65) − 78.387 = 286.5676 − 177.0926 − 78.387 = 31.09%
Note: some circulated examples show 31.11% for the female case — that figure comes from rounding the intermediate logarithms before multiplying. Carried at full precision, the formula gives 31.09%, which is what this calculator computes.
Pass/fail was judged against the archived age-group maxima (male: 20% / 22% / 24% / 26%; female: 30% / 32% / 34% / 36% for the 17–20 / 21–27 / 28–39 / 40+ groups).
Source
Source: AR 600-9 Appendix B, Figures B-1 and B-2 (rescinded version, pre-June 2024). Replaced by ALARACT 053/2024 (single-site tape) and then by Army Directive 2026-13 (WHtR).
Related
- Current WHtR calculator (active standard)
- Single-site tape body fat calculator (archive, June 2024 – July 2026)
- Legacy height & weight screening archive
- Army Body Fat Standards (Historical)
The exact formula derivation, measurement protocol, and rounding rules are documented on the Methodology page.