| B.O.T.U. | B.O.T.U. | 3,600,000 | Board of Trade Unit | MJ | Kilowatt-hour |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| bboe | bboe | 6,117,863,200 | barrel of oil equivalent | barrels of oil equivalent | GJ | Barrel of oil equivalent |  |  |  |
| BOE | BOE | 6,117,863,200 | barrel of oil equivalent | barrels of oil equivalent | GJ | Barrel of oil equivalent |  |  |  |
| BTU | BTU | 1055.05585262 | British thermal unit | kJ | British thermal unit |  |  |  |  |
| Btu | Btu | 1055.05585262 | British thermal unit | kJ | British thermal unit |  |  |  |  |
| BTU-39F | BTU<sub>39°F</sub> | 1059.67 | British thermal unit (39°F) | British thermal units (39°F) | kJ | British thermal unit |  |  |  |
| Btu-39F | Btu<sub>39°F</sub> | 1059.67 | British thermal unit (39°F) | British thermal units (39°F) | kJ | British thermal unit |  |  |  |
| BTU-59F | BTU<sub>59°F</sub> | 1054.804 | British thermal unit (59°F) | British thermal units (59°F) | kJ | British thermal unit |  |  |  |
| Btu-59F | Btu<sub>59°F</sub> | 1054.804 | British thermal unit (59°F) | British thermal units (59°F) | kJ | British thermal unit |  |  |  |
| BTU-60F | BTU<sub>60°F</sub> | 1054.68 | British thermal unit (60°F) | British thermal units (60°F) | kJ | British thermal unit |  |  |  |
| Btu-60F | Btu<sub>60°F</sub> | 1054.68 | British thermal unit (60°F) | British thermal units (60°F) | kJ | British thermal unit |  |  |  |
| BTU-63F | BTU<sub>63°F</sub> | 1054.6 | British thermal unit (63°F) | British thermal units (63°F) | kJ | British thermal unit |  |  |  |
| Btu-63F | Btu<sub>63°F</sub> | 1054.6 | British thermal unit (63°F) | British thermal units (63°F) | kJ | British thermal unit |  |  |  |
| BTU-ISO | BTU<sub>ISO</sub> | 1055.056 | British thermal unit (ISO) | British thermal units (ISO) | kJ | British thermal unit |  |  |  |
| Btu-ISO | =BTU-ISO |  |  |  |  |  |  |  |  |
| BTU-IT | BTU<sub>IT</sub> | 1055.05585262 | British thermal unit (IT) | British thermal units (IT) | kJ | British thermal unit |  |  |  |
| Btu-IT | Btu<sub>IT</sub> | 1055.05585262 | British thermal unit (IT) | British thermal units (IT) | kJ | British thermal unit |  |  |  |
| BTU-mean | BTU<sub>mean</sub> | 1055.87 | British thermal unit (mean) | British thermal units (mean) | kJ | British thermal unit |  |  |  |
| Btu-mean | Btu<sub>mean</sub> | 1055.87 | British thermal unit (mean) | British thermal units (mean) | kJ | British thermal unit |  |  |  |
| BTU-th | BTU<sub>th</sub> | 1054.35026444 | British thermal unit (thermochemical) | British thermal units (thermochemical) | kJ | British thermal unit |  |  |  |
| Btu-th | Btu<sub>th</sub> | 1054.35026444 | British thermal unit (thermochemical) | British thermal units (thermochemical) | kJ | British thermal unit |  |  |  |
| Cal | Cal | 4184 | calorie | kJ | Calorie |  |  |  |  |
| cal | cal | 4.184 | calorie | J | Calorie |  |  |  |  |
| Cal-15 | Cal<sub>15</sub> | 4185.8 | Calorie (15°C) | Calories (15°C) | kJ | Calorie |  |  |  |
| cal-15 | cal<sub>15</sub> | 4.1858 | calorie (15°C) | calories (15°C) | J | Calorie |  |  |  |
| Cal-IT | Cal<sub>IT</sub> | 4186.8 | Calorie (International Steam Table) | Calories (International Steam Table) | kJ | Calorie |  |  |  |
| cal-IT | cal<sub>IT</sub> | 4.1868 | calorie (International Steam Table) | calories (International Steam Table) | J | Calorie |  |  |  |
| Cal-th | Cal<sub>th</sub> | 4184 | Calorie (thermochemical) | Calories (thermochemical) | kJ | Calorie |  |  |  |
| cal-th | cal<sub>th</sub> | 4.184 | calorie (thermochemical) | calories (thermochemical) | J | Calorie |  |  |  |
| CHU-IT | CHU<sub>IT</sub> | 1899.100534716 | Celsius heat unit (International Table) | Celsius heat units (International Table) | kJ | Conversion of units#Energy |  |  |  |
| cufootnaturalgas | ~cuftnaturalgas | 1,055,055.85262 | cubic foot of natural gas | cubic foot of natural gas | MJ | Conversion of units#Energy |  |  |  |
| cuftnaturalgas | ~cuftnaturalgas | 1,055,055.85262 | cubic foot of natural gas | cubic feet of natural gas | MJ | Conversion of units#Energy |  |  |  |
| Eh | *E*<sub>h</sub> | 4.35974417e-18 | Hartree | eV | Hartree |  |  |  |  |
| erg | erg | 0.0000001 | erg | μJ | Erg |  |  |  |  |
| eV | eV | 1.602176487e-19 | electronvolt | aJ | Electronvolt |  |  |  |  |
| feV | feV | 1.602176487e-34 | femtoelectronvolt | yJ | Electronvolt |  |  |  |  |
| foe | foe | 1e44 | foe | YJ | Foe (unit) |  |  |  |  |
| ftlb | ft⋅lb | 1.3558179483314004 | foot-pound | J | Foot-pound (energy) |  |  |  |  |
| ftlb-f | ft⋅lb<sub>f</sub> | 1.3558179483314004 | foot-pound force | foot-pounds force | J | Foot-pound (energy) |  |  |  |
| ftlbf | ft⋅lbf | 1.3558179483314004 | foot-pound force | foot-pounds force | J | Foot-pound (energy) |  |  |  |
| ftpdl | ft⋅pdl | 0.0421401100938048 | foot-poundal | J | Foot-poundal |  |  |  |  |
| GeV | GeV | 1.602176487e-10 | gigaelectronvolt | nJ | Electronvolt |  |  |  |  |
| gTNT | ~gram of TNT | 4184 | gram of TNT | grams of TNT | kJ | TNT equivalent |  |  |  |
| Gtoe | Gtoe | 4.1868e19 | gigatonne of oil equivalent | gigatonnes of oil equivalent | EJ | Tonne of oil equivalent |  |  |  |
| GtonTNT | ~gigaton of TNT | 4.184e18 | gigaton of TNT | gigatons of TNT | EJ | TNT equivalent |  |  |  |
| GtTNT | ~gigatonne of TNT | 4.184e18 | gigatonne of TNT | gigatonnes of TNT | EJ | TNT equivalent |  |  |  |
| GW.h | GW⋅h | 3.6e12 | gigawatt-hour | TJ | Kilowatt-hour |  |  |  |  |
| GWh | GWh | 3.6e12 | gigawatt-hour | TJ | Kilowatt-hour |  |  |  |  |
| hph | hp⋅h | 2,684,519.537696172792 | horsepower-hour | kWh | Horsepower |  |  |  |  |
| inlb | in⋅lb | 0.1129848290276167 | inch-pound | mJ | Foot-pound (energy) |  |  |  |  |
| inlb-f | in⋅lb<sub>f</sub> | 0.1129848290276167 | inch-pound force | inch-pounds force | mJ | Foot-pound (energy) |  |  |  |
| inlbf | in⋅lbf | 0.1129848290276167 | inch-pound force | inch-pounds force | mJ | Foot-pound (energy) |  |  |  |
| inoz-f | in⋅oz<sub>f</sub> | 0.00706155181422604375 | inch-ounce force | inch-ounces force | mJ | Foot-pound (energy) |  |  |  |
| inozf | in⋅ozf | 0.00706155181422604375 | inch-ounce force | inch-ounces force | mJ | Foot-pound (energy) |  |  |  |
| J | J | 1 | joule | SI | cal | Joule |  |  |  |
| kBOE | kBOE | 6.1178632e12 | kilo barrel of oil equivalent | kilo barrels of oil equivalent | TJ | Barrel of oil equivalent |  |  |  |
| kcal | kcal | 4184 | kilocalorie | kJ | Calorie |  |  |  |  |
| kcal-15 | kcal<sub>15</sub> | 4185.8 | kilocalorie (15°C) | kilocalories (15°C) | kJ | Calorie |  |  |  |
| kcal-IT | kcal<sub>IT</sub> | 4186.8 | kilocalorie (International Steam Table) | kilocalories (International Steam Table) | kJ | Calorie |  |  |  |
| kcal-th | kcal<sub>th</sub> | 4184 | kilocalorie (thermochemical) | kilocalories (thermochemical) | kJ | Calorie |  |  |  |
| kerg | kerg | 0.0001 | kiloerg | mJ | Erg |  |  |  |  |
| keV | keV | 1.602176487e-16 | kiloelectronvolt | fJ | Electronvolt |  |  |  |  |
| kgTNT | ~kilogram of TNT | 4,184,000 | kilogram of TNT | kilograms of TNT | MJ | TNT equivalent |  |  |  |
| kt(TNT) | kt | 4.184e12 | kilotonne | kiloton | TJ | TNT equivalent |  |  |  |
| ktoe | ktoe | 4.1868e13 | kilotonne of oil equivalent | kilotonnes of oil equivalent | TJ | Tonne of oil equivalent |  |  |  |
| ktonTNT | kt | 4.184e12 | kiloton of TNT | kilotons of TNT | TJ | TNT equivalent |  |  |  |
| ktTNT | ~kilotonne of TNT | 4.184e12 | kilotonne of TNT | kilotonnes of TNT | TJ | TNT equivalent |  |  |  |
| kW.h | kW⋅h | 3,600,000 | kilowatt-hour | MJ | Kilowatt-hour |  |  |  |  |
| kWh | kWh | 3,600,000 | kilowatt-hour | MJ | Kilowatt-hour |  |  |  |  |
| Mcal | Mcal | 4,184,000 | megacalorie | MJ | Calorie |  |  |  |  |
| mcal | mcal | 0.004184 | millicalorie | mJ | Calorie |  |  |  |  |
| Mcal-15 | Mcal<sub>15</sub> | 4,185,800 | megacalorie (15°C) | megacalories (15°C) | MJ | Calorie |  |  |  |