| Units | Formula |
|---|
| 1 gigajoule [GJ] = | 109 joule [J] |
| 1 megajoule [MJ] = | 106 joule [J] |
| 1 kilojoule [kJ] = | 1000 joule [J] |
| 1 millijoule [mJ] = | 0.001 joule [J] |
| 1 microjoule [μJ] = | 10-6 joule [J] |
| 1 nanojoule [nJ] = | 10-9 joule [J] |
| 1 attojoule [aJ] = | 10-18 joule [J] |
| 1 megaelectron-volt [MeV] = | 1.60217733 x 10-13 joule [J] |
| 1 kiloelectron-volt [keV] = | 1.60217733 x 10-16 joule [J] |
| 1 electron-volt [eV] = | 1.60217733 x 10-19 joule [J] |
| 1 erg = | 0.0000001 joule [J] |
| 1 gigawatt-hour [GW*h] = | 3.6 x 1012 joule [J] |
| 1 megawatt-hour [MW*h] = | 3600000000 joule [J] |
| 1 kilowatt-hour [kW*h] = | 3600000 joule [J] |
| 1 kilowatt-second [kW*s] = | 1000 joule [J] |
| 1 watt-hour [W*h] = | 3600 joule [J] |
| 1 watt-second [W*s] = | 1 joule [J] |
| 1 newton meter [N*m] = | 1 joule [J] |
| 1 horsepower hour [hp*h] = | 2684519.5368856 joule [J] |
| 1 horsepower (metric) hour = | 2647795.5 joule [J] |
| 1 kilocalorie (IT) [kcal (IT), kcal] = | 4186.8 joule [J] |
| 1 kilocalorie (th) [kcal (th)] = | 4184 joule [J] |
| 1 calorie (IT) [cal (IT), cal] = | 4.1868 joule [J] |
| 1 calorie (th) [cal (th)] = | 4.184 joule [J] |
| 1 calorie (nutritional) [cal (nutritional)] = | 4186.8 joule [J] |
| 1 Btu (IT) [Btu (IT), Btu] = | 1055.05585262 joule [J] |
| 1 Btu (th) [Btu (th)] = | 1054.349999974 joule [J] |
| 1 mega Btu (IT) [MBtu (IT), MBtu] = | 1055055852.62 joule [J] |
| 1 ton-hour (refrigeration) [ton*h] = | 12660670.23144 joule [J] |
| 1 fuel oil equivalent @kiloliter = | 4.019762798 x 1010 joule [J] |
| 1 fuel oil equivalent @barrel (US) = | 6383087908.3509 joule [J] |
| 1 gigaton [Gton] = | 4.184 x 1018 joule [J] |
| 1 megaton [Mton] = | 4.184 x 1015 joule [J] |
| 1 kiloton [kton] = | 4.184 x 1012 joule [J] |
| 1 ton (explosives) = | 4184000000 joule [J] |
| 1 dyne centimeter [dyn*cm] = | 0.0000001 joule [J] |
| 1 gram-force meter [gf*m] = | 0.00980665 joule [J] |
| 1 gram-force centimeter [gf*cm] = | 0.000098066 joule [J] |
| 1 kilogram-force centimeter [kgf*cm] = | 0.0980665 joule [J] |
| 1 kilogram-force meter [kgf*m] = | 9.80665 joule [J] |
| 1 kilopond meter [kp*m] = | 9.80665 joule [J] |
| 1 pound-force foot [lbf*ft] = | 1.355817948 joule [J] |
| 1 pound-force inch [lbf*in] = | 0.112984829 joule [J] |
| 1 ounce-force inch [ozf*in] = | 0.007061552 joule [J] |
| 1 foot-pound [ft*lbf] = | 1.355817948 joule [J] |
| 1 inch-pound [in*lbf] = | 0.112984829 joule [J] |
| 1 inch-ounce [in*ozf] = | 0.007061552 joule [J] |
| 1 poundal foot [pdl*ft] = | 0.04214011 joule [J] |
| 1 therm = | 105505600 joule [J] |
| 1 therm (EC) = | 105505600 joule [J] |
| 1 therm (US) = | 105480400 joule [J] |
| 1 Hartree energy = | 4.3597482 x 10-18 joule [J] |
| 1 Rydberg constant = | 2.1798741 x 10-18 joule [J] |
