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Power P is the changing of energy per time unit. That is the quotient of done work and
the required time. P = W / t; W = work, t = time. The SI unit of power is Watt (W).

Fill in the appropriate line the known power value
abwatt (emu of power)
btu (IT) per hour
btu (IT) per minute
btu (IT) per second
btu (therm.) per hour
btu (therm.) per minute
btu (therm.) per second
calorie (IT) per hour
calorie (IT) per minute
calorie (IT) per second
calorie (therm.) per hour
calorie (therm.) per minute
calorie (therm.) per second
cheval-vapeur (horsepower)
dynecentimeter per second
erg per second
foot-pound force per hour
foot-pound force per minute
foot-pound force per second
foot-poundal per second
horsepower (550 ft-lbf/s)
horsepower (boiler)
horsepower (British)
horsepower (cheval-vapeur)
horsepower Pferdestaerke (metrisch)
horsepower (water)
kilogram force-meter/second
prony
ton (refrigeration, UK)
ton (refrigeration, US)
voltamperes
watts
watt (int. mean)
watt (int. US)

Power conversion chart

Unit Name Symbol SI Equivalent W
abwatt (emu of power) aW 1 x 10-7 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 1.16298 x 10-3 W
calorie (IT) per minute cal (IT)/min 6.9779 x 10-2 W
calorie (IT) per second cal (IT)/s 4.18674 W
calorie (therm.) per hour cal (therm.)/h 1.62222 x 10-3 W
calorie (therm.) per minute cal (therm.)/min 6.97333 x 10-2 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 1 x 10-7 W
erg per second erg/s 1 x 10-7 W
foot-pound force per hour ft-lbf/h 3.76616 x 10-4 W
foot-pound force per minute ft-lbf/min 2.2597 x 10-2 W
foot-pound force per second ft-lbf/s 1.35582 W
foot-poundal per second ft-pdl/s 4.21401 x 10-2 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) = 75 kpf·m/s HP 735.49875 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
ton (refrigeration, UK) CTR (UK) 3922.7 W
ton (refrigeration, US) CTR (US) 3516.8 W
volt-ampere VA 1 W
watt W 1 W
watt (int. mean) W 1.00019 W
watt (int. US) W 1.00016 W

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