{
  "calculator": "body-fat-percentage-calculator",
  "title": "Body Fat Percentage Calculator",
  "site": "AI Fit Hub",
  "input": {},
  "defaults_used": {
    "sex": "male",
    "height_cm": 175,
    "neck_cm": 38,
    "waist_cm": 85,
    "hip_cm": 96,
    "weight_kg": 80,
    "age": 30
  },
  "result": {
    "warnings": [],
    "bodyFatPercent": 16.938027331731348,
    "methods": [
      {
        "name": "U.S. Navy",
        "bodyFatPercent": 16.938027331731348,
        "note": "DoD circumference method. Standard for military fitness assessments."
      },
      {
        "name": "CUN-BAE",
        "bodyFatPercent": 23.84600666389004,
        "note": "BMI-based estimate (Gómez-Ambrosi, 2012). No tape measurements needed."
      }
    ],
    "average": 20.392016997810693,
    "fatMassKg": 13.55042186538508,
    "leanMassKg": 66.44957813461492,
    "category": "Fitness",
    "coachSummary": "Your estimated body fat is 16.9% (Fitness range for males) using the Navy method, with 2 methods averaging 20.4%. At 80 kg, that's 13.6 kg of fat mass and 66.4 kg of lean mass."
  },
  "provenance": {
    "run": "https://aifithub.io/api/run/body-fat-percentage-calculator",
    "page": "https://aifithub.io/body-fat-percentage-calculator/",
    "methodology": "https://aifithub.io/methodology/body-fat-percentage-calculator/",
    "contract": "https://aifithub.io/contracts/body-fat-percentage-calculator.json",
    "engine": "https://aifithub.io/engines/body-fat-percentage-calculator.js",
    "engine_sha256": "8965ac58ae6a5aa4f5ec3628e8170ce1386140b851f4ba0fdaa8469d7123752e",
    "build": "9e8a56a16bda662ba90601b49561a2b176e9c379"
  },
  "disclaimer": "General fitness estimates — not medical advice.",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "cite": "AI Fit Hub, Body Fat Percentage Calculator (engine 8965ac58ae6a), https://aifithub.io/api/run/body-fat-percentage-calculator"
}