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General Data > Energy, power and torque units and equivalents

Energy

Unit Name Symbol SI Equivalent
a.u. of energy E h 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) cal 15 4.185 J
calorie (4°C) cal 4 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 cm 3-atm 0.101325 J
cubic foot atm ft 3-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 E h 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) kcal 15 4185.5 J
kilocalorie (4°C) kcal 4 4204.5 J

Power (Heat flow)

Unit Name Symbol SI Equivalent
abwatt (emu of power) aW 1x10-7 W
British thermal unit (IT) per hour Btu (IT)/h 0.293071 W
British thermal unit (IT) per minute Btu (IT)/min 17.5843 W
British thermal unit (IT) per second Btu (IT)/s 1055.06 W
British thermal unit (therm.) per hour Btu (therm.)/h 0.292875 W
British thermal unit (therm.) per minute Btu (therm.)/min 17.5725 W
British thermal unit (therm.) per second Btu (therm.)/s 1054.35 W
calorie (IT) per hour cal (IT)/h 1.16298x10-3 W
calorie (IT) per minute cal (IT)/min 6.9779x10-2 W
calorie (IT) per second cal (IT)/s 4.18674 W
calorie (therm.) per hour cal (therm.)/h 1.62222x10-3 W
calorie (therm.) per minute cal (therm.)/min 6.97333x10-2 W
calorie (therm.) per second cal (therm.)/s 4.184 W
cheval-vapeur (horsepower) cv, HP 735.499 W
dyne-centimeter per second dyn-cm/s 1x10-7 W
erg per second erg/s 1x10-7 W
foot-pound force per hour ft-lbf/h 3.76616x10-4 W
foot-pound force per minute ft-lbf/min 2.2597x10-2 W
foot-pound force per second ft-lbf/s 1.35582 W
foot-poundal per second ft-pdl/s 4.21401x10-2 W
horsepower (550 ft-lbf/s) HP 745.7 W
horsepower (boiler) HP 9809.5 W
horsepower (British) BHP, hp 745.7 W
horsepower (cheval-vapeur) cv, HP 735.499 W
horsepower (electric) HP 746 W
horsepower (metric) HP 735.499 W
horsepower (water) HP 746.043 W
kilogram force-meter per second< kgf-m/s 9.80665 W
kilowatt kW 1000 W
prony   98.0665 W

Moment, Torque

Unit Name Symbol SI Equivalent
dyne-centimeter dyn-cm 1x10-7 N-m
gram force-centimeter gf-cm 9.80665x10-5 N-m
kilogram force-meter kgf-m 9.80665 N-m
newton-centimeter N-cm 1x10-2 N-m
newton-meter N-m 1 N-m
ounce force-inch ozf-in 7.06155x10-3 N-m
pound force-foot lbf-ft 1.35582 N-m
pound force-inch lbf-in 0.112985 N-m
poundal-foot pdl-ft 4.21401x10-2 N-m