{
  "schemaVersion": 1,
  "lastUpdated": "2026-06-14",
  "title": "Bible Unit Calculator Formulas and Assumptions",
  "formulas": [
    {
      "id": "weight",
      "name": "Weight conversion",
      "formula": "quantity × unit grams = total grams; total grams ÷ 1000 = kilograms; kilograms × 2.2046226218 = pounds"
    },
    {
      "id": "metal",
      "name": "Metal value estimate",
      "formula": "total grams ÷ 31.1034768 = troy ounces; troy ounces × USD price per troy ounce = USD metal value; USD value × manual FX rate = converted currency"
    },
    {
      "id": "wage",
      "name": "Wage comparison",
      "formula": "quantity × unit wage-day estimate × manually entered modern daily wage = modern wage comparison"
    },
    {
      "id": "volume",
      "name": "Volume conversion",
      "formula": "quantity × unit litres = total litres; litres × 0.2641720524 = US gallons"
    },
    {
      "id": "volume-weight",
      "name": "Volume-to-weight estimate",
      "formula": "total litres × selected material kg/L density = kilograms; kilograms × 2.2046226218 = pounds"
    },
    {
      "id": "length",
      "name": "Length and distance",
      "formula": "quantity × unit metres = total metres; metres × 3.280839895 = feet; metres ÷ 1000 = kilometres; kilometres × 0.6213711922 = miles"
    },
    {
      "id": "equivalents",
      "name": "Equivalent biblical units",
      "formula": "base grams/litres/metres ÷ another unit’s grams/litres/metres value = equivalent quantity in that unit"
    }
  ],
  "assumptions": [
    "Ancient units varied by period, region, and standard.",
    "Metal value estimates are not identical to ancient purchasing power.",
    "Dry-measure weight depends on the selected substance density.",
    "Hour and watch times are approximate and depend on daylight, season, and local reckoning.",
    "Modern FX, metal-price, and daily-wage values are manually maintained in current-values.json."
  ]
}