ENERGY
(Full list)
system unit unit-
code
abbrev-
iation
notes sample default
conversion
combination
output units
SI ගිගාjoule GJ GJ 1.0 GJ (280 kWh)
මෙගාjoule MJ MJ 1.0 MJ (0.28 kWh)
කිලෝjoule kJ kJ 1.0 kJ (240 cal)
hectojoule hJ hJ 1.0 hJ (24 cal)
decajoule daJ daJ 1.0 daJ (2.4 cal)
joule J J 1.0 J (0.24 cal)
decijoule dJ dJ 1.0 dJ (0.024 cal)
සෙන්ටිjoule cJ cJ 1.0 cJ (0.0024 cal)
මිලිjoule mJ mJ 1.0 mJ (0.00024 cal)
මයික්‍රොjoule μJ (uJ) μJ 1.0 μJ (2.4×10−7 cal)
nanojoule nJ nJ 1.0 nJ (2.4×10−10 cal)
cgs megaerg Merg Merg 1.0 Merg (0.10 J)
kiloerg kerg kerg 1.0 kerg (0.10 mJ)
erg erg (none) 1.0 erg (0.10 μJ)
Watt-hour multiples terawatt-hour TWh TWh 1.0 TWh (3.6 PJ)
TW.h TW⋅h
gigawatt-hour GWh GWh 1.0 GWh (3.6 TJ)
GW.h GW⋅h
megawatt-hour MWh MWh 1.0 MWh (3.6 GJ)
MW.h MW⋅h
kilowatt-hour kWh kWh 1.0 kWh (3.6 MJ)
kW.h kW⋅h
watt-hour Wh Wh 1.0 Wh (3.6 kJ)
W.h W⋅h
Electron-
volt
multiples
gigaelectronvolt GeV GeV 1.0 GeV (0.16 nJ)
megaelectronvolt MeV MeV 1.0 MeV (0.16 pJ)
kiloelectronvolt keV keV 1.0 keV (0.16 fJ)
electronvolt eV eV 1.0 eV (0.16 aJ)
millielectronvolt meV meV 1.0 meV (0.16 zJ)
Calorie multiples calorie Cal Cal The thermo-chemical calorie is the default definition. For others, see the full list. 1.0 Cal (4.2 kJ)
megacalorie Mcal Mcal 1.0 Mcal (4.2 MJ)
kilocalorie kcal kcal 1.0 kcal (4.2 kJ)
calorie cal cal 1.0 cal (4.2 J)
millicalorie mcal mcal 1.0 mcal (4.2 mJ)
pound/
ounce
-foot/
inch-hour-minute-second
foot-poundal ftpdl ft⋅pdl 1.0 ft⋅pdl (0.042 J)
foot-pound force ftlbf ft⋅lbf 1.0 ft⋅lbf (1.4 J)
ftlb-f ft⋅lbf
inch-pound force inlbf in⋅lbf 1.0 in⋅lbf (110 mJ)
inlb-f in⋅lbf
inch-ounce force inozf in⋅ozf 1.0 in⋅ozf (7.1 mJ)
inoz-f in⋅ozf
horsepower-hour hph hp⋅h 1.0 hp⋅h (0.75 kWh)
British thermal unit British thermal unit Btu Btu The International Steam Table British thermal unit is used. For others, see the full list. 1.0 Btu (1.1 kJ)
BTU BTU
TNT-based units gigatonne of TNT GtTNT (none) 1.0 gigatonne of TNT (4.2 EJ)
gigaton of TNT GtonTNT (none)
megatonne of TNT MtTNT (none) 1.0 megatonne of TNT (4.2 PJ)
megaton of TNT MtonTNT Mt
kilotonne of TNT ktTNT (none) 1.0 kilotonne of TNT (4.2 TJ)
kiloton of TNT ktonTNT kt
tonne of TNT tTNT (none) 1.0 tonne of TNT (4.2 GJ)
ton of TNT tonTNT (none)
Other
Hartree Eh Eh 1.0 Eh (27 eV)
rydberg Ry Ry 1.0 Ry (14 eV)
tonne of oil equivalent toe toe 1.0 toe (42 GJ)
barrel of oil equivalent BOE BOE 1.0 BOE (6.1 GJ)
cubic foot of natural gas cuftnaturalgas (cufootnaturalgas) Unit-code cufootnaturalgas will show "cubic foot of natural gas" if plural. 1.0 cubic foot of natural gas (1.1 MJ)
litre-atmosphere latm l⋅atm 1.0 l⋅atm (100 J)
Latm L⋅atm
imperial gallon-atmosphere impgalatm imp gal⋅atm 1.0 imp gal⋅atm (460 J)
US gallon-atmosphere USgalatm
(usgalatm)
US gal⋅atm 1.0 US gal⋅atm (380 J)
U.S.galatm
(usgalatm)
U.S. gal⋅atm