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"category": "speed", "systems": [ "nautical" ], "toBase": 0.5144444444444445, "exact": true, "name": "Knot", "namePlural": "Knots" }, { "id": "foot-per-second", "symbol": "ft/s", "category": "speed", "systems": [ "imperial" ], "toBase": 0.3048, "exact": true, "nistRef": "derived from NIST SP 811 B.8", "name": "Foot per Second", "namePlural": "Feet per Second" }, { "id": "speed-of-light", "symbol": "c", "category": "speed", "systems": [ "other" ], "toBase": 299792458, "exact": true, "name": "Speed of Light", "namePlural": "Speed of Light" }, { "id": "mach", "symbol": "Ma", "category": "speed", "systems": [ "other" ], "toBase": 343, "exact": false, "name": "Mach", "namePlural": "Mach" }, { "id": "gigajoule", "symbol": "GJ", "category": "energy", "systems": [ "si" ], "toBase": 1000000000, "exact": true, "name": "Gigajoule", "namePlural": "Gigajoules" }, { "id": "petajoule", "symbol": "PJ", "category": "energy", "systems": [ "si" ], "toBase": 1000000000000000, "exact": true, "name": "Petajoule", "namePlural": "Petajoules" }, { "id": "megajoule", "symbol": "MJ", "category": "energy", "systems": [ "si" ], "toBase": 1000000, "exact": true, "name": "Megajoule", "namePlural": "Megajoules" }, { "id": "kilojoule", "symbol": "kJ", "category": "energy", "systems": [ "si" ], "toBase": 1000, "exact": true, "name": "Kilojoule", "namePlural": "Kilojoules" }, { "id": "joule", "symbol": "J", "category": "energy", "systems": [ "si" ], "toBase": 1, "exact": true, "name": "Joule", "namePlural": "Joules" }, { "id": "millijoule", "symbol": "mJ", "category": "energy", "systems": [ "si" ], "toBase": 0.001, "exact": true, "name": "Millijoule", "namePlural": "Millijoules" }, { "id": "microjoule", "symbol": "µJ", "category": "energy", "systems": [ "si" ], "toBase": 0.000001, "exact": true, "name": "microjoule", "namePlural": "microjoule" }, { "id": "nanojoule", "symbol": "nJ", "category": "energy", "systems": [ "si" ], "toBase": 1e-9, "exact": true, "name": "Nanojoule", "namePlural": "Nanojoules" }, { "id": "terajoule", "symbol": "TJ", "category": "energy", "systems": [ "si" ], "toBase": 1000000000000, "exact": true, "name": "Terajoule", "namePlural": "Terajoules" }, { "id": "exajoule", "symbol": "EJ", "category": "energy", "systems": [ "si" ], "toBase": 1000000000000000000, "exact": true, "name": "Exajoule", "namePlural": "Exajoules" }, { "id": "kilocalorie", "symbol": "kcal", "category": "energy", "systems": [ "other" ], "toBase": 4184, "exact": true, "nistRef": "NIST SP 811 B.8", "name": "Kilocalorie", "namePlural": "Kilocalories" }, { "id": "calorie", "symbol": "cal", "category": "energy", "systems": [ "other" ], "toBase": 4.184, "exact": true, "nistRef": "NIST SP 811 B.8", "name": "Calorie", "namePlural": "Calories" }, { "id": "kilowatt-hour", "symbol": "kWh", "category": "energy", "systems": [ "si" ], "toBase": 3600000, "exact": true, "name": "Kilowatt-hour", "namePlural": "Kilowatt-hours" }, { "id": "watt-hour", "symbol": "Wh", "category": "energy", "systems": [ "si" ], "toBase": 3600, "exact": true, "name": "Watt-hour", "namePlural": "Watt-hours" }, { "id": "btu", "symbol": "BTU", "category": "energy", "systems": [ "imperial" ], "toBase": 1055.05585262, "exact": true, "nistRef": "NIST SP 811 B.8", "name": "BTU", "namePlural": "BTUs" }, { "id": "electronvolt", "symbol": "eV", "category": "energy", "systems": [ "other" ], "toBase": 1.602176634e-19, "exact": true, "name": "Electronvolt", "namePlural": "Electronvolts" }, { "id": "megapascal", "symbol": "MPa", "category": "pressure", "systems": [ "si" ], "toBase": 1000000, "exact": true, "name": "Megapascal", "namePlural": "Megapascals" }, { "id": "kilopascal", "symbol": "kPa", "category": "pressure", "systems": [ "si" ], "toBase": 1000, "exact": true, "name": "Kilopascal", "namePlural": "Kilopascals" }, { "id": "hectopascal", "symbol": "hPa", "category": "pressure", "systems": [ "si" ], "toBase": 100, "exact": true, "name": "Hectopascal", "namePlural": "Hectopascals" }, { "id": "pascal", "symbol": "Pa", "category": "pressure", "systems": [ "si" ], "toBase": 1, "exact": true, "name": "Pascal", "namePlural": "Pascals" }, { "id": "bar", "symbol": "bar", "category": "pressure", "systems": [ "other" ], "toBase": 100000, "exact": true, "name": "Bar", "namePlural": "Bars" }, { "id": "millibar", "symbol": "mbar", "category": "pressure", "systems": [ "other" ], "toBase": 100, "exact": true, "name": "Millibar", "namePlural": "Millibars" }, { "id": "atmosphere", "symbol": "atm", "category": "pressure", "systems": [ "other" ], "toBase": 101325, "exact": true, "nistRef": "NIST SP 811 B.8", "name": "Atmosphere", "namePlural": "Atmospheres" }, { "id": "psi", "symbol": "psi", "category": "pressure", "systems": [ "imperial" ], "toBase": 6894.757293168, "exact": false, "name": "PSI", "namePlural": "PSI" }, { "id": "mmhg", "symbol": "mmHg", "category": "pressure", "systems": [ "other" ], "toBase": 133.322387415, "exact": false, "name": "Millimeter of Mercury", "namePlural": "Millimeters of Mercury" }, { "id": "torr", "symbol": "Torr", "category": "pressure", "systems": [ "other" ], "toBase": 133.32236842105263, "exact": true, "name": "Torr", "namePlural": "Torr" }, { "id": "terawatt", "symbol": "TW", "category": "power", "systems": [ "si" ], "toBase": 1000000000000, "exact": true, "name": "Terawatt", "namePlural": "Terawatts" }, { "id": "gigawatt", "symbol": "GW", "category": "power", "systems": [ "si" ], "toBase": 1000000000, "exact": true, "name": "Gigawatt", "namePlural": "Gigawatts" }, { "id": "megawatt", "symbol": "MW", "category": "power", "systems": [ "si" ], "toBase": 1000000, "exact": true, "name": "Megawatt", "namePlural": "Megawatts" }, { "id": "kilowatt", "symbol": "kW", "category": "power", "systems": [ "si" ], "toBase": 1000, "exact": true, "name": "Kilowatt", "namePlural": "Kilowatts" }, { "id": "watt", "symbol": "W", "category": "power", "systems": [ "si" ], "toBase": 1, "exact": true, "name": "Watt", "namePlural": "Watts" }, { "id": "milliwatt", "symbol": "mW", "category": "power", "systems": [ "si" ], "toBase": 0.001, "exact": true, "name": "Milliwatt", "namePlural": "Milliwatts" }, { "id": "microwatt", "symbol": "µW", "category": "power", "systems": [ "si" ], "toBase": 0.000001, "exact": true, "name": "Microwatt", "namePlural": "Microwatts" }, { "id": "nanowatt", "symbol": "nW", "category": "power", "systems": [ "si" ], "toBase": 1e-9, "exact": true, "name": "nanowatt", "namePlural": "nanowatt" }, { "id": "picowatt", "symbol": "pW", "category": "power", "systems": [ "si" ], "toBase": 1e-12, "exact": true, "name": "picowatt", "namePlural": "picowatt" }, { "id": "horsepower", "symbol": "hp", "category": "power", "systems": [ "imperial" ], "toBase": 745.6998715822702, "exact": true, "nistRef": "NIST SP 811 B.8", "name": "Horsepower", "namePlural": "Horsepower" }, { "id": "btu-per-hour", "symbol": "BTU/h", "category": "power", "systems": [ "imperial" ], "toBase": 0.2930710701722222, "exact": true, "nistRef": "derived from NIST SP 811 B.8", "name": "BTU per Hour", "namePlural": "BTUs per Hour" }, { "id": "radian", "symbol": "rad", "category": "angle", "systems": [ "si" ], "toBase": 1, "exact": true, "name": "Radian", "namePlural": "Radians" }, { "id": "degree", "symbol": "°", "category": "angle", "systems": [ "si" ], "toBase": 0.017453292519943295, "exact": false, "name": "Degree", "namePlural": "Degrees" }, { "id": "gradian", "symbol": "gon", "category": "angle", "systems": [ "metric" ], "toBase": 0.015707963267948967, "exact": false, "name": "Gradian", "namePlural": "Gradians" }, { "id": "arcminute", "symbol": "′", "category": "angle", "systems": [ "si" ], "toBase": 0.0002908882086657216, "exact": false, "name": "Arcminute", "namePlural": "Arcminutes" }, { "id": "arcsecond", "symbol": "″", "category": "angle", "systems": [ "si" ], "toBase": 0.00000484813681109536, "exact": false, "name": "Arcsecond", "namePlural": "Arcseconds" }, { "id": "turn", "symbol": "tr", "category": "angle", "systems": [ "metric" ], "toBase": 6.283185307179586, "exact": true, "name": "Turn", "namePlural": "Turns" }, { "id": "quadrant", "symbol": "quadrant", "category": "angle", "systems": [ "other" ], "toBase": 1.5707963267948966, "exact": false, "name": "quadrant", "namePlural": "quadrant" }, { "id": "milliradian", "symbol": "mrad", "category": "angle", "systems": [ "si" ], "toBase": 0.001, "exact": true, "name": "Milliradian", "namePlural": "Milliradians" }, { "id": "microradian", "symbol": "µrad", "category": "angle", "systems": [ "si" ], "toBase": 0.000001, "exact": true, "name": "Microradian", "namePlural": "Microradians" }, { "id": "nanoradian", "symbol": "nrad", "category": "angle", "systems": [ "si" ], "toBase": 1e-9, "exact": true, "name": "Nanoradian", "namePlural": "Nanoradians" }, { "id": "bit", "symbol": "b", "category": "digital-storage", "systems": [ "digital" ], "toBase": 0.125, "exact": true, "name": "Bit", "namePlural": "Bits" }, { "id": "kilobit", "symbol": "kb", "category": "digital-storage", "systems": [ "digital" ], "toBase": 125, "exact": true, "name": "Kilobit", "namePlural": "Kilobits" }, { "id": "megabit", "symbol": "Mb", "category": "digital-storage", "systems": [ "digital" ], "toBase": 125000, "exact": true, "name": "Megabit", "namePlural": "Megabits" }, { "id": "gigabit", "symbol": "Gb", "category": "digital-storage", "systems": [ "digital" ], "toBase": 125000000, "exact": true, "name": "Gigabit", "namePlural": "Gigabits" }, { "id": "terabit", "symbol": "Tb", "category": "digital-storage", "systems": [ "digital" ], "toBase": 125000000000, "exact": true, "name": "Terabit", "namePlural": "Terabits" }, { "id": "petabit", "symbol": "Pb", "category": "digital-storage", "systems": [ "digital" ], "toBase": 125000000000000, "exact": true, "name": "Petabit", "namePlural": "Petabits" }, { "id": "kibibit", "symbol": "Kib", "category": "digital-storage", "systems": [ "digital" ], "toBase": 128, "exact": true, "name": "Kibibit", "namePlural": "Kibibits" }, { "id": "mebibit", "symbol": "Mib", "category": "digital-storage", "systems": [ "digital" ], "toBase": 131072, "exact": true, "name": "Mebibit", "namePlural": "Mebibits" }, { "id": "gibibit", "symbol": "Gib", "category": "digital-storage", "systems": [ "digital" ], "toBase": 134217728, "exact": true, "name": "Gibibit", "namePlural": "Gibibits" }, { "id": "tebibit", "symbol": "Tib", "category": "digital-storage", "systems": [ "digital" ], "toBase": 137438953472, "exact": true, "name": "Tebibit", "namePlural": "Tebibits" }, { "id": "pebibit", "symbol": "Pib", "category": "digital-storage", "systems": [ "digital" ], "toBase": 140737488355328, "exact": true, "name": "Pebibit", "namePlural": "Pebibits" }, { "id": "byte", "symbol": "B", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1, "exact": true, "name": "Byte", "namePlural": "Bytes" }, { "id": "kilobyte", "symbol": "KB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1000, "exact": true, "name": "Kilobyte", "namePlural": "Kilobytes" }, { "id": "megabyte", "symbol": "MB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1000000, "exact": true, "name": "Megabyte", "namePlural": "Megabytes" }, { "id": "gigabyte", "symbol": "GB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1000000000, "exact": true, "name": "Gigabyte", "namePlural": "Gigabytes" }, { "id": "terabyte", "symbol": "TB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1000000000000, "exact": true, "name": "Terabyte", "namePlural": "Terabytes" }, { "id": "petabyte", "symbol": "PB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1000000000000000, "exact": true, "name": "Petabyte", "namePlural": "Petabytes" }, { "id": "kibibyte", "symbol": "KiB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1024, "exact": true, "name": "Kibibyte", "namePlural": "Kibibytes" }, { "id": "mebibyte", "symbol": "MiB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1048576, "exact": true, "name": "Mebibyte", "namePlural": "Mebibytes" }, { "id": "gibibyte", "symbol": "GiB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1073741824, "exact": true, "name": "Gibibyte", "namePlural": "Gibibytes" }, { "id": "tebibyte", "symbol": "TiB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1099511627776, "exact": true, "name": "Tebibyte", "namePlural": "Tebibytes" }, { "id": "pebibyte", "symbol": "PiB", "category": "digital-storage", "systems": [ "digital" ], "toBase": 1125899906842624, "exact": true, "name": "Pebibyte", "namePlural": "Pebibytes" }, { "id": "km-per-liter", "symbol": "km/L", "category": "fuel-economy", "systems": [ "si" ], "toBase": 1, "exact": false, "name": "Kilometer per Liter", "namePlural": "Kilometers per Liter" }, { "id": "mile-per-gallon", "symbol": "mpg", "category": "fuel-economy", "systems": [ "us" ], "toBase": 0.425143707, "exact": false, "aliases": [ "mpg (US)", "miles per gallon" ], "name": "Mile per Gallon (US)", "namePlural": "Miles per Gallon (US)" }, { "id": "mile-per-gallon-uk", "symbol": "mpg (UK)", "category": "fuel-economy", "systems": [ "imperial" ], "toBase": 0.354006189935, "exact": false, "aliases": [ "mpg (UK)", "miles per gallon (UK)" ], "name": "Mile per Gallon (UK)", "namePlural": "Miles per Gallon (UK)" }, { "id": "liter-per-100km", "symbol": "L/100km", "category": "fuel-economy", "systems": [ "si" ], "toBase": 0, "exact": false, "name": "Liter per 100km", "namePlural": "Liters per 100km" } ] }