{
  "units": [
    {"name": "Meter", "symbol": "m", "type": "Length", "system": "SI", "base_unit": true, "conversion": 1},
    {"name": "Kilometer", "symbol": "km", "type": "Length", "system": "SI", "base_unit": false, "conversion": 1000},
    {"name": "Centimeter", "symbol": "cm", "type": "Length", "system": "SI", "base_unit": false, "conversion": 0.01},
    {"name": "Millimeter", "symbol": "mm", "type": "Length", "system": "SI", "base_unit": false, "conversion": 0.001},
    {"name": "Mile", "symbol": "mi", "type": "Length", "system": "Imperial", "base_unit": false, "conversion": 1609.344},
    {"name": "Yard", "symbol": "yd", "type": "Length", "system": "Imperial", "base_unit": false, "conversion": 0.9144},
    {"name": "Foot", "symbol": "ft", "type": "Length", "system": "Imperial", "base_unit": false, "conversion": 0.3048},
    {"name": "Inch", "symbol": "in", "type": "Length", "system": "Imperial", "base_unit": false, "conversion": 0.0254},
    {"name": "Kilogram", "symbol": "kg", "type": "Mass", "system": "SI", "base_unit": true, "conversion": 1},
    {"name": "Gram", "symbol": "g", "type": "Mass", "system": "SI", "base_unit": false, "conversion": 0.001},
    {"name": "Milligram", "symbol": "mg", "type": "Mass", "system": "SI", "base_unit": false, "conversion": 0.000001},
    {"name": "Pound", "symbol": "lb", "type": "Mass", "system": "Imperial", "base_unit": false, "conversion": 0.453592},
    {"name": "Ounce", "symbol": "oz", "type": "Mass", "system": "Imperial", "base_unit": false, "conversion": 0.0283495},
    {"name": "Liter", "symbol": "L", "type": "Volume", "system": "SI", "base_unit": true, "conversion": 1},
    {"name": "Milliliter", "symbol": "mL", "type": "Volume", "system": "SI", "base_unit": false, "conversion": 0.001},
    {"name": "Gallon", "symbol": "gal", "type": "Volume", "system": "Imperial", "base_unit": false, "conversion": 3.78541},
    {"name": "Quart", "symbol": "qt", "type": "Volume", "system": "Imperial", "base_unit": false, "conversion": 0.946353},
    {"name": "Pint", "symbol": "pt", "type": "Volume", "system": "Imperial", "base_unit": false, "conversion": 0.473176},
    {"name": "Cup", "symbol": "cup", "type": "Volume", "system": "Imperial", "base_unit": false, "conversion": 0.236588},
    {"name": "Celsius", "symbol": "°C", "type": "Temperature", "system": "SI", "base_unit": true, "conversion": null},
    {"name": "Fahrenheit", "symbol": "°F", "type": "Temperature", "system": "Imperial", "base_unit": false, "conversion": null},
    {"name": "Kelvin", "symbol": "K", "type": "Temperature", "system": "SI", "base_unit": false, "conversion": null},
    {"name": "Second", "symbol": "s", "type": "Time", "system": "SI", "base_unit": true, "conversion": 1},
    {"name": "Minute", "symbol": "min", "type": "Time", "system": "SI", "base_unit": false, "conversion": 60},
    {"name": "Hour", "symbol": "h", "type": "Time", "system": "SI", "base_unit": false, "conversion": 3600}
  ]
}