Health calculator
Army Body Fat Calculator
Estimate body fat percentage with an Army-style tape method using height, neck, waist or abdomen, hip when needed, sex, and body weight.
FormulaMen: 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76; Women: 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387
Formula
Army tape body-fat estimate
This is a calculator estimate. Verify current official body-composition policy and measurement procedure before using any result for service decisions.
Men: 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76; Women: 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387
A male example with waist 49 in, neck 16 in, and height 69 in uses log10(33) and log10(69) in the formula.
SourcesThis calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
Sources and assumptions
Source notes
This calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
- Effective year
- Current rules
- Last verified
- 2026-06-18
This is a calculator estimate. Verify current official body-composition policy and measurement procedure before using any result for service decisions.
Official and reference sources
Assumptions
- Measurements are converted to inches before applying the tape-method equation.
- Male calculation uses waist or abdomen minus neck.
- Female calculation uses waist plus hip minus neck.
Not included
- Current service eligibility decisions, command policy updates, official weigh-in procedures, exemption rules, single-site alternative formulas, and medical assessment.
FAQ6 common questions for this calculator.
FAQs
Is this the official Army body fat result?+
No. It is an independent calculator that applies a published tape-method equation. Official results depend on current policy, measurement procedure, rounding, and authorized personnel.
Why does the Army body fat calculator ask for hip measurement?+
The female tape-method equation uses hip circumference. The male equation uses waist or abdomen and neck with height.
How does the Army Body Fat Calculator calculate the result?+
For the Army Body Fat Calculator, it uses the Army tape body-fat estimate: Men: 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76; Women: 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387. A male example with waist 49 in, neck 16 in, and height 69 in uses log10(33) and log10(69) in the formula.
What information do I need to use the Army Body Fat Calculator?+
For the Army Body Fat Calculator, enter height, neck, waist or abdomen, hip when needed, sex, and body weight. Keep the units consistent with the calculator fields and compare your setup with the worked example on the page.
How accurate is the Army Body Fat Calculator?+
Army Body Fat Calculator is only as accurate as the height, neck, waist or abdomen, hip when needed, sex, and body weight entered. It applies the Army tape body-fat estimate shown on this page, then rounds for readability. Treat the output as screening guidance rather than a diagnosis.
What should I check before using the Army Body Fat Calculator result?+
For the Army Body Fat Calculator, check height, neck, waist or abdomen, hip when needed, sex, and body weight, unit choices, and whether the calculator's assumptions fit the person being assessed. Use the result as screening or planning context, not as a diagnosis.
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Health guide
How to use the Army Body Fat Calculator
Estimate body fat percentage with an Army-style tape method using height, neck, waist or abdomen, hip when needed, sex, and body weight. The page also explains the army tape body-fat estimate and shows a practical example: A male example with waist 49 in, neck 16 in, and height 69 in uses log10(33) and log10(69) in the formula.
- 1
Enter your details
Enter an Army-style tape method using height, neck, waist or abdomen, hip when needed, sex, and body weight, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the army tape body-fat estimate: Men: 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76; Women: 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387.
- 3
Compare scenarios
Change one or more inputs to see how they affect the army Body Fat Calculator result before you use the estimate.