| 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 |  |  |  |
| kLatm | kL⋅atm | 101,325 | kilolitre-atmosphere | kiloliter-atmosphere | kJ | Atmosphere (unit) |  |  |  |
| klatm | kl⋅atm | 101,325 | kilolitre-atmosphere | kiloliter-atmosphere | kJ | Atmosphere (unit) |  |  |  |
| 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 | Watt-hour |  |  |  |  |
| kWh | kWh | 3,600,000 | kilowatt-hour | MJ | Watt-hour |  |  |  |  |
| Latm | L⋅atm | 101.325 | litre-atmosphere | liter-atmosphere | J | Atmosphere (unit) |  |  |  |
| latm | l⋅atm | 101.325 | litre-atmosphere | liter-atmosphere | J | Atmosphere (unit) |  |  |  |
| m3atm | m<sup>3</sup>⋅atm | 101,325 | cubic metre-atmosphere | cubic meter-atmosphere | kJ | Atmosphere (unit) |  |  |  |
| 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 |  |  |  |
| mcal-15 | mcal<sub>15</sub> | 0.0041858 | millicalorie (15°C) | millicalories (15°C) | mJ | Calorie |  |  |  |
| Mcal-IT | Mcal<sub>IT</sub> | 4,186,800 | megacalorie (International Steam Table) | megacalories (International Steam Table) | MJ | Calorie |  |  |  |
| mcal-IT | mcal<sub>IT</sub> | 0.0041868 | millicalorie (International Steam Table) | millicalories (International Steam Table) | mJ | Calorie |  |  |  |
| Mcal-th | Mcal<sub>th</sub> | 4,184,000 | megacalorie (thermochemical) | megacalories (thermochemical) | MJ | Calorie |  |  |  |
| mcal-th | mcal<sub>th</sub> | 0.004184 | millicalorie (thermochemical) | millicalories (thermochemical) | mJ | Calorie |  |  |  |
| Merg | Merg | 0.1 | megaerg | J | Erg |  |  |  |  |
| merg | merg | 0.0000000001 | millierg | μJ | Erg |  |  |  |  |
| MeV | MeV | 1.602176487e-13 | megaelectronvolt | pJ | Electronvolt |  |  |  |  |
| meV | meV | 1.602176487e-22 | millielectronvolt | zJ | Electronvolt |  |  |  |  |
| MLatm | ML⋅atm | 101,325,000 | megalitre-atmosphere | megaliter-atmosphere | MJ | Atmosphere (unit) |  |  |  |
| Mlatm | Ml⋅atm | 101,325,000 | megalitre-atmosphere | megaliter-atmosphere | MJ | Atmosphere (unit) |  |  |  |
| mLatm | L⋅atm | 0.101325 | millilitre-atmosphere | milliliter-atmosphere | mJ | Atmosphere (unit) |  |  |  |
| mlatm | l⋅atm | 0.101325 | millilitre-atmosphere | milliliter-atmosphere | mJ | Atmosphere (unit) |  |  |  |
| MMBtu | MMBtu | 1,055,055,852.62 | million British thermal units | million British thermal units | GJ | British thermal unit |  |  |  |
| Mt(TNT) | Mt | 4.184e15 | megatonne | megaton | PJ | TNT equivalent |  |  |  |
| Mtoe | Mtoe | 4.1868e16 | megatonne of oil equivalent | megatonnes of oil equivalent | PJ | Tonne of oil equivalent |  |  |  |
| MtonTNT | Mt | 4.184e15 | megaton of TNT | megatons of TNT | PJ | TNT equivalent |  |  |  |
| mtonTNT | ~milliton of TNT | 4,184,000 | milliton of TNT | millitons of TNT | MJ | TNT equivalent |  |  |  |
| MtTNT | ~megatonne of TNT | 4.184e15 | megatonne of TNT | megatonnes of TNT | PJ | TNT equivalent |  |  |  |
| mtTNT | ~millitonne of TNT | 4,184,000 | millitonne of TNT | millitonnes of TNT | MJ | TNT equivalent |  |  |  |
| MW.h | MW⋅h | 3,600,000,000 | megawatt-hour | GJ | Watt-hour |  |  |  |  |
| mW.h | mW⋅h | 3.6 | milliwatt-hour | J | Watt-hour |  |  |  |  |
| MWh | MWh | 3,600,000,000 | megawatt-hour | GJ | Watt-hour |  |  |  |  |
| mWh | mWh | 3.6 | milliwatt-hour | J | Watt-hour |  |  |  |  |
| neV | neV | 1.602176487e-28 | nanoelectronvolt | yJ | Electronvolt |  |  |  |  |
| PeV | PeV | 0.0001602176487 | petaelectronvolt | mJ | Electronvolt |  |  |  |  |
| peV | peV | 1.602176487e-31 | picoelectronvolt | yJ | Electronvolt |  |  |  |  |
| PSh | PSh | 2647795.5 | Pferdestärkenstunde | kWh | Pferdestärkenstunde |  |  |  |  |
| quad | quad | 1.054804e18 | quadrillion British thermal units | quadrillion British thermal units | EJ | Quad (unit) |  |  |  |
| Ry | Ry | 2.1798741e-18 | rydberg | eV | Rydberg constant |  |  |  |  |
| scc | scc | 0.101325 | standard cubic centimetre | standard cubic centimeter | mJ | Atmosphere (unit) |  |  |  |
| scf | scf | 2869.2044809344 | standard cubic foot | standard cubic feet | kJ | Atmosphere (unit) |  |  |  |
| scfoot | scf | 2869.2044809344 | standard cubic foot | standard cubic foot | kJ | Atmosphere (unit) |  |  |  |
| scy | scy | 77,468.5209852288 | standard cubic yard | kJ | Atmosphere (unit) |  |  |  |  |
| sl | sl | 101.325 | standard litre | standard liter | J | Atmosphere (unit) |  |  |  |
| t(TNT) | t | 4,184,000,000 | tonne | ton | GJ | TNT equivalent |  |  |  |
| TeV | TeV | 1.602176487e-7 | teraelectronvolt | μJ | Electronvolt |  |  |  |  |
| th | th | 4,186,800 | thermie | MJ | Conversion of units#Energy |  |  |  |  |
| thm-EC | thm (EC) | 105,506,000 | therm (EC) | therms (EC) | MJ | Therm |  |  |  |
| thm-UK | thm (UK) | 105,505,585.257348 | therm (UK) | therms (UK) | MJ | Therm |  |  |  |
| thm-US | thm (US) | thm (U.S.) | 105,480,400 | therm (US) | therms (US) | therm (U.S.) | therms (U.S.) | MJ | Therm |
| toe | toe | 41,868,000,000 | tonne of oil equivalent | tonnes of oil equivalent | GJ | Tonne of oil equivalent |  |  |  |
| tonTNT | ~ton of TNT | 4,184,000,000 | ton of TNT | tons of TNT | GJ | TNT equivalent |  |  |  |
| tTNT | ~tonne of TNT | 4,184,000,000 | tonne of TNT | tonnes of TNT | GJ | TNT equivalent |  |  |  |
| TtonTNT | ~teraton of TNT | 4.184e21 | teraton of TNT | teratons of TNT | ZJ | TNT equivalent |  |  |  |
| TtTNT | ~teratonne of TNT | 4.184e21 | teratonne of TNT | teratonnes of TNT | ZJ | TNT equivalent |  |  |  |
| TW.h | TW⋅h | 3.6e15 | terawatt-hour | PJ | Watt-hour |  |  |  |  |
| TWh | TWh | 3.6e15 | terawatt-hour | PJ | Watt-hour |  |  |  |  |
| USgalatm | US&nbsp;gal⋅atm | U.S.&nbsp;gal⋅atm | 383.5568490138 | US gallon-atmosphere | U.S. gallon-atmosphere | J | Atmosphere (unit) |  |  |
| W.h | W⋅h | 3600 | watt-hour | kJ | Watt-hour |  |  |  |  |
| Wh | Wh | 3600 | watt-hour | kJ | Watt-hour |  |  |  |  |
| μerg | μerg | 1e-13 | microerg | nJ | Erg |  |  |  |  |
| μeV | μeV | 1.602176487e-25 | microelectronvolt | yJ | Electronvolt |  |  |  |  |
| μW.h | μW⋅h | 0.0036 | microwatt-hour | mJ | Watt-hour |  |  |  |  |
| μWh | μWh | 0.0036 | microwatt-hour | mJ | Watt-hour |  |  |  |  |
| -kW.h | =kW.h | link = Kilowatt hour |  |  |  |  |  |  |  |
| btu | =BTU |  |  |  |  |  |  |  |  |
| Calorie | =Cal |  |  |  |  |  |  |  |  |
| ft.lbf | =ftlbf |  |  |  |  |  |  |  |  |
| ft·lbf | =ftlbf |  |  |  |  |  |  |  |  |
| g-cal-15 | =cal-15 |  |  |  |  |  |  |  |  |
| g-cal-IT | =cal-IT |  |  |  |  |  |  |  |  |
| g-cal-th | =cal-th |  |  |  |  |  |  |  |  |
| g-kcal-15 | =kcal-15 |  |  |  |  |  |  |  |  |
| g-kcal-IT | =kcal-IT |  |  |  |  |  |  |  |  |
| g-kcal-th | =kcal-th |  |  |  |  |  |  |  |  |
| g-Mcal-15 | =Mcal-15 |  |  |  |  |  |  |  |  |
| g-mcal-15 | =mcal-15 |  |  |  |  |  |  |  |  |
| g-Mcal-IT | =Mcal-IT |  |  |  |  |  |  |  |  |
| g-mcal-IT | =mcal-IT |  |  |  |  |  |  |  |  |
| g-Mcal-th | =Mcal-th |  |  |  |  |  |  |  |  |
| g-mcal-th | =mcal-th |  |  |  |  |  |  |  |  |
| GW-h | =GW.h |  |  |  |  |  |  |  |  |
| GW·h | =GW.h |  |  |  |  |  |  |  |  |
| Hartree | =Eh |  |  |  |  |  |  |  |  |