Energy Converter
unit-converter
Convert between SI, electrical, thermal/fuel, mechanical, and atomic energy units. All Unit Conversions panel included.
Convert Energy
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All Unit Conversions
Dedicated converters (SI, electrical, thermal/fuel, nutrition, mechanical, and atomic energy units)
272 pages — every pair of units below, with fixed input/output, formulas, examples, and conversion tables.
- toe to gigajoule (Ton of Oil Equivalent to Gigajoule)
- toe to mmbtu (Ton of Oil Equivalent to Million BTU (MMBtu, IT))
- toe to therm (Ton of Oil Equivalent to Therm)
- toe to kilowatt-hour (Ton of Oil Equivalent to Kilowatt Hour)
- toe to kilowatt-hour-thermal (Ton of Oil Equivalent to Kilowatt-hour (thermal))
- toe to megajoule (Ton of Oil Equivalent to Megajoule)
- toe to kilocalorie (Ton of Oil Equivalent to Kilocalorie)
- toe to watt-hour (Ton of Oil Equivalent to Watt Hour)
- toe to kilojoule (Ton of Oil Equivalent to Kilojoule)
- toe to btu (Ton of Oil Equivalent to British Thermal Unit)
- toe to calorie (Ton of Oil Equivalent to Calorie)
- toe to foot-pound (Ton of Oil Equivalent to Feet-Pound)
- toe to joule (Ton of Oil Equivalent to Joule)
- toe to gigaelectronvolt (Ton of Oil Equivalent to Gigaelectronvolt)
- toe to megaelectronvolt (Ton of Oil Equivalent to Megaelectronvolt)
- toe to electronvolt (Ton of Oil Equivalent to Electronvolt)
- gigajoule to toe (Gigajoule to Ton of Oil Equivalent)
- gigajoule to mmbtu (Gigajoule to Million BTU (MMBtu, IT))
- gigajoule to therm (Gigajoule to Therm)
- gigajoule to kilowatt-hour (Gigajoule to Kilowatt Hour)
- gigajoule to kilowatt-hour-thermal (Gigajoule to Kilowatt-hour (thermal))
- gigajoule to megajoule (Gigajoule to Megajoule)
- gigajoule to kilocalorie (Gigajoule to Kilocalorie)
- gigajoule to watt-hour (Gigajoule to Watt Hour)
- gigajoule to kilojoule (Gigajoule to Kilojoule)
- gigajoule to btu (Gigajoule to British Thermal Unit)
- gigajoule to calorie (Gigajoule to Calorie)
- gigajoule to foot-pound (Gigajoule to Feet-Pound)
- gigajoule to joule (Gigajoule to Joule)
- gigajoule to gigaelectronvolt (Gigajoule to Gigaelectronvolt)
- gigajoule to megaelectronvolt (Gigajoule to Megaelectronvolt)
- gigajoule to electronvolt (Gigajoule to Electronvolt)
- mmbtu to toe (Million BTU (MMBtu, IT) to Ton of Oil Equivalent)
- mmbtu to gigajoule (Million BTU (MMBtu, IT) to Gigajoule)
- mmbtu to therm (Million BTU (MMBtu, IT) to Therm)
- mmbtu to kilowatt-hour (Million BTU (MMBtu, IT) to Kilowatt Hour)
- mmbtu to kilowatt-hour-thermal (Million BTU (MMBtu, IT) to Kilowatt-hour (thermal))
- mmbtu to megajoule (Million BTU (MMBtu, IT) to Megajoule)
- mmbtu to kilocalorie (Million BTU (MMBtu, IT) to Kilocalorie)
- mmbtu to watt-hour (Million BTU (MMBtu, IT) to Watt Hour)
- mmbtu to kilojoule (Million BTU (MMBtu, IT) to Kilojoule)
- mmbtu to btu (Million BTU (MMBtu, IT) to British Thermal Unit)
- mmbtu to calorie (Million BTU (MMBtu, IT) to Calorie)
- mmbtu to foot-pound (Million BTU (MMBtu, IT) to Feet-Pound)
- mmbtu to joule (Million BTU (MMBtu, IT) to Joule)
- mmbtu to gigaelectronvolt (Million BTU (MMBtu, IT) to Gigaelectronvolt)
- mmbtu to megaelectronvolt (Million BTU (MMBtu, IT) to Megaelectronvolt)
- mmbtu to electronvolt (Million BTU (MMBtu, IT) to Electronvolt)
- therm to toe (Therm to Ton of Oil Equivalent)
- therm to gigajoule (Therm to Gigajoule)
- therm to mmbtu (Therm to Million BTU (MMBtu, IT))
- therm to kilowatt-hour (Therm to Kilowatt Hour)
- therm to kilowatt-hour-thermal (Therm to Kilowatt-hour (thermal))
- therm to megajoule (Therm to Megajoule)
- therm to kilocalorie (Therm to Kilocalorie)
- therm to watt-hour (Therm to Watt Hour)
- therm to kilojoule (Therm to Kilojoule)
- therm to btu (Therm to British Thermal Unit)
- therm to calorie (Therm to Calorie)
- therm to foot-pound (Therm to Feet-Pound)
- therm to joule (Therm to Joule)
- therm to gigaelectronvolt (Therm to Gigaelectronvolt)
- therm to megaelectronvolt (Therm to Megaelectronvolt)
- therm to electronvolt (Therm to Electronvolt)
- kilowatt-hour to toe (Kilowatt Hour to Ton of Oil Equivalent)
- kilowatt-hour to gigajoule (Kilowatt Hour to Gigajoule)
- kilowatt-hour to mmbtu (Kilowatt Hour to Million BTU (MMBtu, IT))
- kilowatt-hour to therm (Kilowatt Hour to Therm)
- kilowatt-hour to kilowatt-hour-thermal (Kilowatt Hour to Kilowatt-hour (thermal))
- kilowatt-hour to megajoule (Kilowatt Hour to Megajoule)
- kilowatt-hour to kilocalorie (Kilowatt Hour to Kilocalorie)
- kilowatt-hour to watt-hour (Kilowatt Hour to Watt Hour)
- kilowatt-hour to kilojoule (Kilowatt Hour to Kilojoule)
- kilowatt-hour to btu (Kilowatt Hour to British Thermal Unit)
- kilowatt-hour to calorie (Kilowatt Hour to Calorie)
- kilowatt-hour to foot-pound (Kilowatt Hour to Feet-Pound)
- kilowatt-hour to joule (Kilowatt Hour to Joule)
- kilowatt-hour to gigaelectronvolt (Kilowatt Hour to Gigaelectronvolt)
- kilowatt-hour to megaelectronvolt (Kilowatt Hour to Megaelectronvolt)
- kilowatt-hour to electronvolt (Kilowatt Hour to Electronvolt)
- kilowatt-hour-thermal to toe (Kilowatt-hour (thermal) to Ton of Oil Equivalent)
- kilowatt-hour-thermal to gigajoule (Kilowatt-hour (thermal) to Gigajoule)
- kilowatt-hour-thermal to mmbtu (Kilowatt-hour (thermal) to Million BTU (MMBtu, IT))
- kilowatt-hour-thermal to therm (Kilowatt-hour (thermal) to Therm)
- kilowatt-hour-thermal to kilowatt-hour (Kilowatt-hour (thermal) to Kilowatt Hour)
- kilowatt-hour-thermal to megajoule (Kilowatt-hour (thermal) to Megajoule)
- kilowatt-hour-thermal to kilocalorie (Kilowatt-hour (thermal) to Kilocalorie)
- kilowatt-hour-thermal to watt-hour (Kilowatt-hour (thermal) to Watt Hour)
- kilowatt-hour-thermal to kilojoule (Kilowatt-hour (thermal) to Kilojoule)
- kilowatt-hour-thermal to btu (Kilowatt-hour (thermal) to British Thermal Unit)
- kilowatt-hour-thermal to calorie (Kilowatt-hour (thermal) to Calorie)
- kilowatt-hour-thermal to foot-pound (Kilowatt-hour (thermal) to Feet-Pound)
- kilowatt-hour-thermal to joule (Kilowatt-hour (thermal) to Joule)
- kilowatt-hour-thermal to gigaelectronvolt (Kilowatt-hour (thermal) to Gigaelectronvolt)
- kilowatt-hour-thermal to megaelectronvolt (Kilowatt-hour (thermal) to Megaelectronvolt)
- kilowatt-hour-thermal to electronvolt (Kilowatt-hour (thermal) to Electronvolt)
- megajoule to toe (Megajoule to Ton of Oil Equivalent)
- megajoule to gigajoule (Megajoule to Gigajoule)
- megajoule to mmbtu (Megajoule to Million BTU (MMBtu, IT))
- megajoule to therm (Megajoule to Therm)
- megajoule to kilowatt-hour (Megajoule to Kilowatt Hour)
- megajoule to kilowatt-hour-thermal (Megajoule to Kilowatt-hour (thermal))
- megajoule to kilocalorie (Megajoule to Kilocalorie)
- megajoule to watt-hour (Megajoule to Watt Hour)
- megajoule to kilojoule (Megajoule to Kilojoule)
- megajoule to btu (Megajoule to British Thermal Unit)
- megajoule to calorie (Megajoule to Calorie)
- megajoule to foot-pound (Megajoule to Feet-Pound)
- megajoule to joule (Megajoule to Joule)
- megajoule to gigaelectronvolt (Megajoule to Gigaelectronvolt)
- megajoule to megaelectronvolt (Megajoule to Megaelectronvolt)
- megajoule to electronvolt (Megajoule to Electronvolt)
- kilocalorie to toe (Kilocalorie to Ton of Oil Equivalent)
- kilocalorie to gigajoule (Kilocalorie to Gigajoule)
- kilocalorie to mmbtu (Kilocalorie to Million BTU (MMBtu, IT))
- kilocalorie to therm (Kilocalorie to Therm)
- kilocalorie to kilowatt-hour (Kilocalorie to Kilowatt Hour)
- kilocalorie to kilowatt-hour-thermal (Kilocalorie to Kilowatt-hour (thermal))
- kilocalorie to megajoule (Kilocalorie to Megajoule)
- kilocalorie to watt-hour (Kilocalorie to Watt Hour)
- kilocalorie to kilojoule (Kilocalorie to Kilojoule)
- kilocalorie to btu (Kilocalorie to British Thermal Unit)
- kilocalorie to calorie (Kilocalorie to Calorie)
- kilocalorie to foot-pound (Kilocalorie to Feet-Pound)
- kilocalorie to joule (Kilocalorie to Joule)
- kilocalorie to gigaelectronvolt (Kilocalorie to Gigaelectronvolt)
- kilocalorie to megaelectronvolt (Kilocalorie to Megaelectronvolt)
- kilocalorie to electronvolt (Kilocalorie to Electronvolt)
- watt-hour to toe (Watt Hour to Ton of Oil Equivalent)
- watt-hour to gigajoule (Watt Hour to Gigajoule)
- watt-hour to mmbtu (Watt Hour to Million BTU (MMBtu, IT))
- watt-hour to therm (Watt Hour to Therm)
- watt-hour to kilowatt-hour (Watt Hour to Kilowatt Hour)
- watt-hour to kilowatt-hour-thermal (Watt Hour to Kilowatt-hour (thermal))
- watt-hour to megajoule (Watt Hour to Megajoule)
- watt-hour to kilocalorie (Watt Hour to Kilocalorie)
- watt-hour to kilojoule (Watt Hour to Kilojoule)
- watt-hour to btu (Watt Hour to British Thermal Unit)
- watt-hour to calorie (Watt Hour to Calorie)
- watt-hour to foot-pound (Watt Hour to Feet-Pound)
- watt-hour to joule (Watt Hour to Joule)
- watt-hour to gigaelectronvolt (Watt Hour to Gigaelectronvolt)
- watt-hour to megaelectronvolt (Watt Hour to Megaelectronvolt)
- watt-hour to electronvolt (Watt Hour to Electronvolt)
- kilojoule to toe (Kilojoule to Ton of Oil Equivalent)
- kilojoule to gigajoule (Kilojoule to Gigajoule)
- kilojoule to mmbtu (Kilojoule to Million BTU (MMBtu, IT))
- kilojoule to therm (Kilojoule to Therm)
- kilojoule to kilowatt-hour (Kilojoule to Kilowatt Hour)
- kilojoule to kilowatt-hour-thermal (Kilojoule to Kilowatt-hour (thermal))
- kilojoule to megajoule (Kilojoule to Megajoule)
- kilojoule to kilocalorie (Kilojoule to Kilocalorie)
- kilojoule to watt-hour (Kilojoule to Watt Hour)
- kilojoule to btu (Kilojoule to British Thermal Unit)
- kilojoule to calorie (Kilojoule to Calorie)
- kilojoule to foot-pound (Kilojoule to Feet-Pound)
- kilojoule to joule (Kilojoule to Joule)
- kilojoule to gigaelectronvolt (Kilojoule to Gigaelectronvolt)
- kilojoule to megaelectronvolt (Kilojoule to Megaelectronvolt)
- kilojoule to electronvolt (Kilojoule to Electronvolt)
- btu to toe (British Thermal Unit to Ton of Oil Equivalent)
- btu to gigajoule (British Thermal Unit to Gigajoule)
- btu to mmbtu (British Thermal Unit to Million BTU (MMBtu, IT))
- btu to therm (British Thermal Unit to Therm)
- btu to kilowatt-hour (British Thermal Unit to Kilowatt Hour)
- btu to kilowatt-hour-thermal (British Thermal Unit to Kilowatt-hour (thermal))
- btu to megajoule (British Thermal Unit to Megajoule)
- btu to kilocalorie (British Thermal Unit to Kilocalorie)
- btu to watt-hour (British Thermal Unit to Watt Hour)
- btu to kilojoule (British Thermal Unit to Kilojoule)
- btu to calorie (British Thermal Unit to Calorie)
- btu to foot-pound (British Thermal Unit to Feet-Pound)
- btu to joule (British Thermal Unit to Joule)
- btu to gigaelectronvolt (British Thermal Unit to Gigaelectronvolt)
- btu to megaelectronvolt (British Thermal Unit to Megaelectronvolt)
- btu to electronvolt (British Thermal Unit to Electronvolt)
- calorie to toe (Calorie to Ton of Oil Equivalent)
- calorie to gigajoule (Calorie to Gigajoule)
- calorie to mmbtu (Calorie to Million BTU (MMBtu, IT))
- calorie to therm (Calorie to Therm)
- calorie to kilowatt-hour (Calorie to Kilowatt Hour)
- calorie to kilowatt-hour-thermal (Calorie to Kilowatt-hour (thermal))
- calorie to megajoule (Calorie to Megajoule)
- calorie to kilocalorie (Calorie to Kilocalorie)
- calorie to watt-hour (Calorie to Watt Hour)
- calorie to kilojoule (Calorie to Kilojoule)
- calorie to btu (Calorie to British Thermal Unit)
- calorie to foot-pound (Calorie to Feet-Pound)
- calorie to joule (Calorie to Joule)
- calorie to gigaelectronvolt (Calorie to Gigaelectronvolt)
- calorie to megaelectronvolt (Calorie to Megaelectronvolt)
- calorie to electronvolt (Calorie to Electronvolt)
- foot-pound to toe (Feet-Pound to Ton of Oil Equivalent)
- foot-pound to gigajoule (Feet-Pound to Gigajoule)
- foot-pound to mmbtu (Feet-Pound to Million BTU (MMBtu, IT))
- foot-pound to therm (Feet-Pound to Therm)
- foot-pound to kilowatt-hour (Feet-Pound to Kilowatt Hour)
- foot-pound to kilowatt-hour-thermal (Feet-Pound to Kilowatt-hour (thermal))
- foot-pound to megajoule (Feet-Pound to Megajoule)
- foot-pound to kilocalorie (Feet-Pound to Kilocalorie)
- foot-pound to watt-hour (Feet-Pound to Watt Hour)
- foot-pound to kilojoule (Feet-Pound to Kilojoule)
- foot-pound to btu (Feet-Pound to British Thermal Unit)
- foot-pound to calorie (Feet-Pound to Calorie)
- foot-pound to joule (Feet-Pound to Joule)
- foot-pound to gigaelectronvolt (Feet-Pound to Gigaelectronvolt)
- foot-pound to megaelectronvolt (Feet-Pound to Megaelectronvolt)
- foot-pound to electronvolt (Feet-Pound to Electronvolt)
- joule to toe (Joule to Ton of Oil Equivalent)
- joule to gigajoule (Joule to Gigajoule)
- joule to mmbtu (Joule to Million BTU (MMBtu, IT))
- joule to therm (Joule to Therm)
- joule to kilowatt-hour (Joule to Kilowatt Hour)
- joule to kilowatt-hour-thermal (Joule to Kilowatt-hour (thermal))
- joule to megajoule (Joule to Megajoule)
- joule to kilocalorie (Joule to Kilocalorie)
- joule to watt-hour (Joule to Watt Hour)
- joule to kilojoule (Joule to Kilojoule)
- joule to btu (Joule to British Thermal Unit)
- joule to calorie (Joule to Calorie)
- joule to foot-pound (Joule to Feet-Pound)
- joule to gigaelectronvolt (Joule to Gigaelectronvolt)
- joule to megaelectronvolt (Joule to Megaelectronvolt)
- joule to electronvolt (Joule to Electronvolt)
- gigaelectronvolt to toe (Gigaelectronvolt to Ton of Oil Equivalent)
- gigaelectronvolt to gigajoule (Gigaelectronvolt to Gigajoule)
- gigaelectronvolt to mmbtu (Gigaelectronvolt to Million BTU (MMBtu, IT))
- gigaelectronvolt to therm (Gigaelectronvolt to Therm)
- gigaelectronvolt to kilowatt-hour (Gigaelectronvolt to Kilowatt Hour)
- gigaelectronvolt to kilowatt-hour-thermal (Gigaelectronvolt to Kilowatt-hour (thermal))
- gigaelectronvolt to megajoule (Gigaelectronvolt to Megajoule)
- gigaelectronvolt to kilocalorie (Gigaelectronvolt to Kilocalorie)
- gigaelectronvolt to watt-hour (Gigaelectronvolt to Watt Hour)
- gigaelectronvolt to kilojoule (Gigaelectronvolt to Kilojoule)
- gigaelectronvolt to btu (Gigaelectronvolt to British Thermal Unit)
- gigaelectronvolt to calorie (Gigaelectronvolt to Calorie)
- gigaelectronvolt to foot-pound (Gigaelectronvolt to Feet-Pound)
- gigaelectronvolt to joule (Gigaelectronvolt to Joule)
- gigaelectronvolt to megaelectronvolt (Gigaelectronvolt to Megaelectronvolt)
- gigaelectronvolt to electronvolt (Gigaelectronvolt to Electronvolt)
- megaelectronvolt to toe (Megaelectronvolt to Ton of Oil Equivalent)
- megaelectronvolt to gigajoule (Megaelectronvolt to Gigajoule)
- megaelectronvolt to mmbtu (Megaelectronvolt to Million BTU (MMBtu, IT))
- megaelectronvolt to therm (Megaelectronvolt to Therm)
- megaelectronvolt to kilowatt-hour (Megaelectronvolt to Kilowatt Hour)
- megaelectronvolt to kilowatt-hour-thermal (Megaelectronvolt to Kilowatt-hour (thermal))
- megaelectronvolt to megajoule (Megaelectronvolt to Megajoule)
- megaelectronvolt to kilocalorie (Megaelectronvolt to Kilocalorie)
- megaelectronvolt to watt-hour (Megaelectronvolt to Watt Hour)
- megaelectronvolt to kilojoule (Megaelectronvolt to Kilojoule)
- megaelectronvolt to btu (Megaelectronvolt to British Thermal Unit)
- megaelectronvolt to calorie (Megaelectronvolt to Calorie)
- megaelectronvolt to foot-pound (Megaelectronvolt to Feet-Pound)
- megaelectronvolt to joule (Megaelectronvolt to Joule)
- megaelectronvolt to gigaelectronvolt (Megaelectronvolt to Gigaelectronvolt)
- megaelectronvolt to electronvolt (Megaelectronvolt to Electronvolt)
- electronvolt to toe (Electronvolt to Ton of Oil Equivalent)
- electronvolt to gigajoule (Electronvolt to Gigajoule)
- electronvolt to mmbtu (Electronvolt to Million BTU (MMBtu, IT))
- electronvolt to therm (Electronvolt to Therm)
- electronvolt to kilowatt-hour (Electronvolt to Kilowatt Hour)
- electronvolt to kilowatt-hour-thermal (Electronvolt to Kilowatt-hour (thermal))
- electronvolt to megajoule (Electronvolt to Megajoule)
- electronvolt to kilocalorie (Electronvolt to Kilocalorie)
- electronvolt to watt-hour (Electronvolt to Watt Hour)
- electronvolt to kilojoule (Electronvolt to Kilojoule)
- electronvolt to btu (Electronvolt to British Thermal Unit)
- electronvolt to calorie (Electronvolt to Calorie)
- electronvolt to foot-pound (Electronvolt to Feet-Pound)
- electronvolt to joule (Electronvolt to Joule)
- electronvolt to gigaelectronvolt (Electronvolt to Gigaelectronvolt)
- electronvolt to megaelectronvolt (Electronvolt to Megaelectronvolt)
Common questions (FAQ)
10 quick answers with guides and links to the matching converter.
- How many joules are in a calorie (thermochemical)?
- How many calories are in a kilocalorie?
- How many joules are in a kilowatt-hour?
- How many joules are in a kilojoule?
- How many joules are in a watt-hour?
- How many joules are in a British thermal unit (IT)?
- How many joules are in an electronvolt?
- How many kilowatt-hours are in a kilocalorie?
- How many kilowatt-hours are in a British thermal unit (IT)?
- How many kilocalories are in a kilojoule?
Energy Converter Guide
Quick start
- Enter a value and pick source and target units. The result updates as you type.
- Use swap to reverse units and copy to copy the result. The All Unit Conversions panel lists your value across every supported energy unit.
Formulas & deeper content
Need formulas, worked examples, and tables for one pair (e.g. kilowatt-hours to joules)? Use a dedicated converter from the list above.
Short answers to common questions are in the FAQ section above. Thermochemical calories and IT BTU match the factors in this tool.
Example uses
- Nutrition: kilocalories and calories.
- Electricity: kilowatt-hours and watt-hours.
- Science: joules, kilojoules, and electronvolts.