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Energy Converter
Converts between 11 energy and work units instantly, showing the exact conversion factor and a…
57 tools · free · no account
Energy & Power Converters
Energy is the quantity and power is energy per unit of time; both are here. So are the fuel-economy conversions, which catch people out because miles per gallon and litres per 100 km run in opposite directions — as one figure rises the other falls.
57 shown
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Power Converter
Converts between 7 power units instantly, showing the exact conversion factor and a full…
003
Fuel Economy Converter
Converts between 4 fuel economy units instantly, showing the exact conversion factor and a…
004
Fuel Consumption Converter
Converts between 5 fuel consumption units instantly, showing the exact conversion factor and a…
005
Kilojoule to Kilocalorie (food calorie) Converter
Converts kilojoule to kilocalorie (food calorie) instantly. One kilojoule equals 0.2390057361…
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Kilocalorie (food calorie) to Kilojoule Converter
Converts kilocalorie (food calorie) to kilojoule instantly. One kilocalorie (food calorie)…
007
Kilowatt hour to Joule Converter
Converts kilowatt hour to joule instantly. One kilowatt hour equals 3.6e+6 joule. Includes a…
008
BTU to Kilowatt hour Converter
Converts btu to kilowatt hour instantly. One btu equals 0.0002930711 kilowatt hour. Includes a…
009
Horsepower (mechanical) to Kilowatt Converter
Converts horsepower (mechanical) to kilowatt instantly. One horsepower (mechanical) equals…
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Kilowatt to Horsepower (mechanical) Converter
Converts kilowatt to horsepower (mechanical) instantly. One kilowatt equals 1.3410220896…
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Metric horsepower (PS) to Horsepower (mechanical) Converter
Converts metric horsepower (ps) to horsepower (mechanical) instantly. One metric horsepower…
012
Miles per US gallon to Kilometre per litre Converter
Converts miles per us gallon to kilometre per litre instantly. One miles per us gallon equals…
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Kilometre per litre to Miles per US gallon Converter
Converts kilometre per litre to miles per us gallon instantly. One kilometre per litre equals…
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Miles per UK gallon to Kilometre per litre Converter
Converts miles per uk gallon to kilometre per litre instantly. One miles per uk gallon equals…
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Joule to Calorie (small) Converter
Converts joule to calorie (small) instantly. One joule equals 0.2390057361 calorie (small)…
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Calorie (small) to Joule Converter
Converts calorie (small) to joule instantly. One calorie (small) equals 4.184 joule. Includes…
017
Kilocalorie (food calorie) to Calorie (small) Converter
Converts kilocalorie (food calorie) to calorie (small) instantly. One kilocalorie (food…
018
Kilowatt hour to Kilojoule Converter
Converts kilowatt hour to kilojoule instantly. One kilowatt hour equals 3600 kilojoule…
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Joule to Kilojoule Converter
Converts joule to kilojoule instantly. One joule equals 0.001 kilojoule. Includes a reference…
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BTU to Kilojoule Converter
Converts btu to kilojoule instantly. One btu equals 1.0550558526 kilojoule. Includes a…
021
Kilowatt hour to BTU Converter
Converts kilowatt hour to btu instantly. One kilowatt hour equals 3412.1416331279 btu…
022
Electronvolt to Joule Converter
Converts electronvolt to joule instantly. One electronvolt equals 1.602177e-19 joule. Includes…
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Watt to Horsepower (mechanical) Converter
Converts watt to horsepower (mechanical) instantly. One watt equals 0.0013410221 horsepower…
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Horsepower (mechanical) to Watt Converter
Converts horsepower (mechanical) to watt instantly. One horsepower (mechanical) equals…
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Kilowatt to Watt Converter
Converts kilowatt to watt instantly. One kilowatt equals 1000 watt. Includes a reference table…
026
Watt to Kilowatt Converter
Converts watt to kilowatt instantly. One watt equals 0.001 kilowatt. Includes a reference…
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Megawatt to Kilowatt Converter
Converts megawatt to kilowatt instantly. One megawatt equals 1000 kilowatt. Includes a…
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Metric horsepower (PS) to Kilowatt Converter
Converts metric horsepower (ps) to kilowatt instantly. One metric horsepower (ps) equals…
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BTU per hour to Kilowatt Converter
Converts btu per hour to kilowatt instantly. One btu per hour equals 0.0002930711 kilowatt…
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Kilometre per litre to Miles per UK gallon Converter
Converts kilometre per litre to miles per uk gallon instantly. One kilometre per litre equals…
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Miles per US gallon to Miles per UK gallon Converter
Converts miles per us gallon to miles per uk gallon instantly. One miles per us gallon equals…
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Miles per UK gallon to Miles per US gallon Converter
Converts miles per uk gallon to miles per us gallon instantly. One miles per uk gallon equals…
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Litre per 100 km to US gallon per 100 miles Converter
Converts litre per 100 km to us gallon per 100 miles instantly. One litre per 100 km equals…
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US gallon per 100 miles to Litre per 100 km Converter
Converts us gallon per 100 miles to litre per 100 km instantly. One us gallon per 100 miles…
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Litre per 100 km to UK gallon per 100 miles Converter
Converts litre per 100 km to uk gallon per 100 miles instantly. One litre per 100 km equals…
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Kilojoule to Joule Converter
Converts kilojoule to joule instantly. One kilojoule equals 1000 joule. Includes a reference…
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Megajoule to Kilowatt hour Converter
Converts megajoule to kilowatt hour instantly. One megajoule equals 0.2777777778 kilowatt…
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Kilowatt hour to Megajoule Converter
Converts kilowatt hour to megajoule instantly. One kilowatt hour equals 3.6 megajoule…
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Therm to Kilowatt hour Converter
Converts therm to kilowatt hour instantly. One therm equals 29.3071070172 kilowatt hour…
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Foot-pound to Joule Converter
Converts foot-pound to joule instantly. One foot-pound equals 1.3558179483 joule. Includes a…
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Calorie (small) to Kilocalorie (food calorie) Converter
Converts calorie (small) to kilocalorie (food calorie) instantly. One calorie (small) equals…
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BTU to Joule Converter
Converts btu to joule instantly. One btu equals 1055.05585262 joule. Includes a reference…
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Kilowatt to BTU per hour Converter
Converts kilowatt to btu per hour instantly. One kilowatt equals 3412.1416351331 btu per hour…
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Horsepower (mechanical) to Metric horsepower (PS) Converter
Converts horsepower (mechanical) to metric horsepower (ps) instantly. One horsepower…
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Watt to Foot-pound per second Converter
Converts watt to foot-pound per second instantly. One watt equals 0.7375621493 foot-pound per…
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Megawatt to Horsepower (mechanical) Converter
Converts megawatt to horsepower (mechanical) instantly. One megawatt equals 1341.022089595…
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Watt hour to Kilowatt hour Converter
Converts watt hour to kilowatt hour instantly. One watt hour equals 0.001 kilowatt hour…
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Watt hour to Joule Converter
Converts watt hour to joule instantly. One watt hour equals 3600 joule. Includes a reference…
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Therm to Megajoule Converter
Converts therm to megajoule instantly. One therm equals 105.505585262 megajoule. Includes a…
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Electronvolt to Kilojoule Converter
Converts electronvolt to kilojoule instantly. One electronvolt equals 1.602177e-22 kilojoule…
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Foot-pound per second to Watt Converter
Converts foot-pound per second to watt instantly. One foot-pound per second equals…
052
BTU per hour to Watt Converter
Converts btu per hour to watt instantly. One btu per hour equals 0.29307107 watt. Includes a…
053
Metric horsepower (PS) to Watt Converter
Converts metric horsepower (ps) to watt instantly. One metric horsepower (ps) equals 735.49875…
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Litre per 100 km to Litre per 1000 km Converter
Converts litre per 100 km to litre per 1000 km instantly. One litre per 100 km equals 10 litre…
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UK gallon per 100 miles to US gallon per 100 miles Converter
Converts uk gallon per 100 miles to us gallon per 100 miles instantly. One uk gallon per 100…
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Mile per litre to Kilometre per litre Converter
Converts mile per litre to kilometre per litre instantly. One mile per litre equals…
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Kilometre per litre to Mile per litre Converter
Converts kilometre per litre to mile per litre instantly. One kilometre per litre equals…
About energy & power converters
Energy is the quantity and power is energy per unit of time; both are here. So are the fuel-economy conversions, which catch people out because miles per gallon and litres per 100 km run in opposite directions — as one figure rises the other falls.
All 57 tools here are free and open immediately — there is no registration step, no credit card and no daily allowance to run out of. Most of them do their work in your browser, which means the page keeps working on a slow connection and your input is never sent to a server.
Other converters
Length & Distance 67Weight & Mass 66Area & Land 82Volume & Capacity 59Cooking Measures 25Flours & Grains 108Sugars & Sweeteners 72Fats, Dairy & Liquids 72Time & Frequency 46Data & Digital 53Speed, Force & Motion 65Pressure & Flow 67Light, Sound & Waves 37Typography & Design 19Lab Units 64 All converters 57