[
  {"name": "Kelvin", "symbol": "K", "isBase": true},
  {
    "name": "Celsius",
    "symbol": "°C",
    "baseUnit": "Kelvin",
    "toBase": "x + 273.15",
    "fromBase": "x - 273.15",
  },
  {
    "name": "Fahrenheit",
    "symbol": "°F",
    "baseUnit": "Kelvin",
    "toBase": "(x - 32) * 5/9 + 273.15",
    "fromBase": "(x - 273.15) * 9/5 + 32",
  },
  {
    "name": "Rankine",
    "symbol": "°R",
    "baseUnit": "Kelvin",
    "toBase": "x * 5/9",
    "fromBase": "x * 9/5",
  },
  {
    "name": "Réaumur",
    "symbol": "°Ré",
    "baseUnit": "Kelvin",
    "toBase": "x * 5/4 + 273.15",
    "fromBase": "(x - 273.15) * 4/5",
  },
  {
    "name": "Delisle",
    "symbol": "°D",
    "baseUnit": "Kelvin",
    "toBase": "373.15 - x * 2/3",
    "fromBase": "(373.15 - x) * 3/2",
  },
  {
    "name": "Rømer",
    "symbol": "°Rø",
    "baseUnit": "Kelvin",
    "toBase": "(x - 7.5) * 40/21 + 273.15",
    "fromBase": "(x - 273.15) * 21/40 + 7.5",
  },
  {
    "name": "Gas Mark",
    "symbol": "GM",
    "baseUnit": "Kelvin",
    "toBase": """
      if (x < 1) {
        double celsius = (243 - 25 * (log(1 / x) / log(2))) / 1.8;
        return celsius + 273.15; // convert Celsius to Kelvin
      } else {
        double celsius = x * 14 + 121;
        return celsius + 273.15;
      }
    """,
    "fromBase": """
      double celsius = x - 273.15; // convert Kelvin to Celsius
      if (celsius < 135) { // corresponds to G < 1
        return pow(2, (1.8 * celsius - 243) / 25);
      } else {
        return (celsius - 121) / 14;
      }
    """
  },
  {
    "name": "Solar Temperature",
    "symbol": "°Sol",
    "baseUnit": "Kelvin",
    "toBase": "x * 1000000",
    "fromBase": "x / 1000000",
  }
]