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Physics > Energy Units and Equivalents


Page location: Info Library> Physics > Energy Units and Equivalents
Unit Name Symbol SI Equivalent
a.u. of energy
Eh 4.35975x10-18 J
barrel oil equivalent
bboe 6.12x109 J
bboe (barrel oil equivalent)
bboe 6.12x109 J
BeV (billion eV)
BeV 1.60218x10-10 J
British thermal unit (ISO)
Btu (ISO) 1055.06 J
British thermal unit (IT)
Btu (IT) 1055.06 J
British thermal unit (mean)
Btu (mean) 1055.87 J
British thermal unit (thermochemical)
Btu (therm.) 1054.35 J
calorie (15°C)
cal15 4.185 J
calorie (4°C)
cal4 4.2045 J
Calorie (diet kilocalorie)
Cal, kcal 4180 J
calorie (IT) (International Steam Table)
cal (IT) 4.18674 J
calorie (mean)
cal mean 4.19002 J
calorie (thermochemical)
cal (therm.) 4.184 J
Celsius-heat unit
Chu 1899.18 J
coulomb volt
C-V 1 J
cubic centimeter-atm
cm3-atm 0.101325 J
cubic foot atm
ft3-atm 2869.2 J
electronvolt
eV 1.60218x10-19 J
erg
erg 1x10-7 J
foot-pound force
ft-lbf 1.35582 J
foot-poundal
ft-pdl 4.21401x10-2 J
gigaelectronvolt
GeV 1.60218x10-10 J
gram calorie
gram-cal 4.18674 J
hartree
Eh 4.35975x10-18 J
horsepower (550ft-lbf/s)-hour
Hp-h 2.68452x106 J
inch pound force
in-lbf 0.112985 J
joule
J 1 J
kilocalorie (15°C)
kcal15 4185.5 J
kilocalorie (4°C)
kcal4 4204.5 J