How it works
The primary mode uses waist circumference divided by height. A ratio below 0.55 is the current Army benchmark announced for the 2026 body-composition policy.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?standard=Army standardChoice · Required · Default: current2026 · Accepted values: current2026, legacy2023
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?unitSystem=UnitsChoice · Required · Default: metric · Accepted values: metric, imperial
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?sex=Sex used by equationChoice · Required · Default: male · Accepted values: male, female
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?age=AgeNumber · Required · Default: 30
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?weightKg=WeightNumber · Required · Default: 70 · Used when unitSystem = metric
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?heightCm=HeightNumber · Required · Default: 175 · Used when unitSystem = metric
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?weightLb=WeightNumber · Required · Default: 154 · Used when unitSystem = imperial
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?feet=Height feetNumber · Required · Default: 5 · Used when unitSystem = imperial
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?inches=Height inchesNumber · Required · Default: 9 · Used when unitSystem = imperial
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?waistCm=Waist at navelNumber · Required · Default: 90 · Used when unitSystem = metric
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?waistIn=Waist at navelNumber · Required · Default: 35.4 · Used when unitSystem = imperial
Outputs
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ratioWaist-to-height ratioNumber · Primary output
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statusCurrent standard resultText
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maximumWaistMaximum waist at 0.55Text
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legacyBodyFatLegacy 2023 body-fat estimatePercentage
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legacyStatusLegacy age-band resultText
Legacy comparison
The optional legacy mode preserves the 2023 one-site body-fat estimate for historical comparison. It is not the default and should not be mistaken for the current standard.