Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[BFP \% = 86.010 \times \log_{10}(\text{waist}_{cm} - \text{neck}_{cm}) - 70.041 \times \log_{10}(\text{height}_{cm}) + 36.76\]
BFP \% = 86.010 \times \log_{10}(\text{waist}_{cm} - \text{neck}_{cm}) - 70.041 \times \log_{10}(\text{height}_{cm}) + 36.76
Formula (extracted LaTeX)
\[BFP \% = 163.205 \times \log_{10}(\text{waist}_{cm} + \text{hip}_{cm} - \text{neck}_{cm}) - 97.684 \times \log_{10}(\text{height}_{cm}) - 78.387\]
BFP \% = 163.205 \times \log_{10}(\text{waist}_{cm} + \text{hip}_{cm} - \text{neck}_{cm}) - 97.684 \times \log_{10}(\text{height}_{cm}) - 78.387
Formula (extracted LaTeX)
\[BMI = \frac{\text{weight}_{kg}}{\text{height}_m^2}\]
BMI = \frac{\text{weight}_{kg}}{\text{height}_m^2}
Formula (extracted LaTeX)
\[BFP \% = (1.20 \times BMI) + (0.23 \times \text{Age}) - (10.8 \times \text{Gender}) - 5.4\]
BFP \% = (1.20 \times BMI) + (0.23 \times \text{Age}) - (10.8 \times \text{Gender}) - 5.4
Formula (extracted LaTeX)
\[\text{Fat Mass} = \text{Total Weight} \times (BFP \% / 100)\]
\text{Fat Mass} = \text{Total Weight} \times (BFP \% / 100)
Formula (extracted LaTeX)
\[\text{Lean Body Mass} = \text{Total Weight} - \text{Fat Mass}\]
\text{Lean Body Mass} = \text{Total Weight} - \text{Fat Mass}
Formula (extracted text)
$BFP \% = 86.010 \times \log_{10}(\text{waist}_{cm} - \text{neck}_{cm}) - 70.041 \times \log_{10}(\text{height}_{cm}) + 36.76$
Formula (extracted text)
$BFP \% = 163.205 \times \log_{10}(\text{waist}_{cm} + \text{hip}_{cm} - \text{neck}_{cm}) - 97.684 \times \log_{10}(\text{height}_{cm}) - 78.387$
Formula (extracted text)
$BMI = \frac{\text{weight}_{kg}}{\text{height}_m^2}$
Formula (extracted text)
$BFP \% = (1.20 \times BMI) + (0.23 \times \text{Age}) - (10.8 \times \text{Gender}) - 5.4$
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
  • Home — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/
  • Health & Fitness — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/health-fitness
  • Diet & Nutrition — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/subcategories/diet-nutrition
  • BMI Calculator — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/bmi-calculator
  • BMR Calculator — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/bmr
  • TDEE Calculator — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/tdee
  • Ideal Weight Calculator — calcdomain.com · Accessed 2026-01-19
    https://calcdomain.com/ideal-weight
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
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Why Use This Calculator?

  • Get an estimate of your body composition, not just weight.
  • Compare two of the most common estimation methods.
  • Understand the formulas and data sources behind the calculation.
  • Track changes in fat mass and lean mass over time (when used consistently).

Related Health Tools

  • BMI Calculator
  • BMR Calculator
  • TDEE Calculator
  • Ideal Weight Calculator

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