{
  "version": "2026-09-23-v11",
  "publisher": "Convertisseur.com",
  "method": "Valeurs attendues écrites séparément du catalogue de calcul. Les tolérances concernent la comparaison informatique, pas la précision d’une mesure.",
  "rows": [
    {
      "id": "pouces-cm",
      "tool": "distance/pouce-centimetre",
      "amount": "1",
      "direction": "forward",
      "expected": 2.54,
      "unit": "cm",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#pouce",
      "note": "Un pouce international, facteur exact."
    },
    {
      "id": "pieds-composes",
      "tool": "distance/pied-centimetre",
      "amount": "5.5",
      "direction": "forward",
      "expected": 167.64,
      "unit": "cm",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#pied",
      "note": "5,5 pieds signifie 5 pieds et 6 pouces."
    },
    {
      "id": "livre-kg",
      "tool": "poids/kilogramme-livre",
      "amount": "1",
      "direction": "reverse",
      "expected": 0.45359237,
      "unit": "kg",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#livre",
      "note": "Une livre avoirdupois internationale."
    },
    {
      "id": "gallon-us",
      "tool": "mathematique/litre-gallon",
      "amount": "1",
      "direction": "reverse",
      "expected": 3.785411784,
      "unit": "L",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#gallon-us",
      "note": "Gallon liquide US, hors gallon sec."
    },
    {
      "id": "once-us",
      "tool": "mathematique/millilitre-once",
      "amount": "1",
      "direction": "reverse",
      "expected": 29.5735295625,
      "unit": "mL",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#once-liquide-us",
      "note": "Once liquide US, pas une once de masse."
    },
    {
      "id": "celsius-absolu",
      "tool": "temperature/celsius-fahrenheit",
      "amount": "20",
      "direction": "forward",
      "expected": 68,
      "unit": "°F",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#celsius-fahrenheit",
      "note": "Température absolue : le décalage de 32 s’applique."
    },
    {
      "id": "celsius-ecart",
      "tool": "temperature/ecart-celsius-fahrenheit",
      "amount": "20",
      "direction": "forward",
      "expected": 36,
      "unit": "°F d’écart",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#ecart-temperature",
      "note": "Écart : le décalage de 32 ne s’applique pas."
    },
    {
      "id": "zero-kelvin",
      "tool": "temperature/celsius-kelvin",
      "amount": "-273.15",
      "direction": "forward",
      "expected": 0,
      "unit": "K",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#kelvin-celsius",
      "note": "Zéro absolu dans le domaine admis par le moteur."
    },
    {
      "id": "vitesse-36",
      "tool": "vitesse/kilometre-heure-metre-seconde",
      "amount": "36",
      "direction": "forward",
      "expected": 10,
      "unit": "m/s",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#kmh-ms",
      "note": "Conversion de vitesse, pas de durée de trajet."
    },
    {
      "id": "un-hectare",
      "tool": "mathematique/hectare-metre-carre",
      "amount": "1",
      "direction": "forward",
      "expected": 10000,
      "unit": "m²",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#hectare",
      "note": "Unité de surface : pas un facteur de longueur."
    },
    {
      "id": "pouce-carre",
      "tool": "mathematique/centimetre-carre-pouce-carre",
      "amount": "1",
      "direction": "reverse",
      "expected": 6.4516,
      "unit": "cm²",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#pouce-carre",
      "note": "Le facteur de longueur est élevé au carré."
    },
    {
      "id": "kwh-joule",
      "tool": "science/kilowattheure-joule",
      "amount": "1",
      "direction": "forward",
      "expected": 3600000,
      "unit": "J",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#kilowattheure",
      "note": "Énergie, distincte d’une puissance en kW."
    },
    {
      "id": "kgf-newton",
      "tool": "science/newton-kilogramme-force",
      "amount": "1",
      "direction": "reverse",
      "expected": 9.80665,
      "unit": "N",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#kilogramme-force",
      "note": "Sous pesanteur normale conventionnelle."
    },
    {
      "id": "mois-moyen",
      "tool": "temps/jour-mois",
      "amount": "30.436875",
      "direction": "forward",
      "expected": 1,
      "unit": "mois",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#mois-moyen",
      "note": "Mois moyen grégorien, pas une échéance de calendrier."
    },
    {
      "id": "frequence",
      "tool": "science/megahertz-hertz",
      "amount": "2.5",
      "direction": "forward",
      "expected": 2500000,
      "unit": "Hz",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#megahertz",
      "note": "Le préfixe méga multiplie par un million."
    },
    {
      "id": "demi-tour",
      "tool": "mathematique/degre-radian",
      "amount": "180",
      "direction": "forward",
      "expected": 3.141592653589793,
      "unit": "rad",
      "toleranceAbsolute": 1e-10,
      "toleranceRelative": 1e-12,
      "reference": "/referentiel-unites.html#degre",
      "note": "Relation exacte 180° = π rad ; valeur numérique arrondie."
    }
  ]
}