 J/s  i joule per second

 W  i watt
 SI base unit of power
In mechanical terms, one watt equals about 0.001 341 02 horsepower (hp) or 0.737 562 footpound per second (lbf/s). In electrical terms, one watt is the power produced by a current of one ampere flowing through an electric potential of one volt.

 kW  i kilowatt

 MW  i megawatt

 kJ/hr  i kilojoule per hour

 kg_{f} • m/s  i kilogram force meter per second

 cal/s  i calorie per second

 cal/hr  i calorie per hour

 BTU/s  i British thermal units per second

 BTU/hr  i British thermal units per hour

 Ton (RT)  i tons
 Unit of power used in refrigeration engineering. One ton of refrigeration is intended to be the power required to freeze one short ton of water at 0?C in 24 hours. This is assumed to be exactly 12 000 Btu per hour

 pk (Metric hp)  i metric horse power
 Unit of power, defined to be the power required to raise a mass of 75 kilograms at a velocity of 1 meter per second. This is approximately 735.499 watts or 0.986 32 horsepower

 hp  i horse power
 Unit of power representing the power exerted by a horse in pulling

 ehp  i electric horse power
 Unit of power, equal to exactly 746 watts (550.221 foot pounds per second)

 bhp  i boiler horse power
 The boiler horsepower is defined to be the power required to convert 30 pounds (13.61 kilograms) per hour of water at 100 ?F (37.78 ?C) to saturated steam at a pressure of 70 pounds per square inch gauge (482.6 kilopascals gauge). This power, about 33 471 Btu per hour or 9.8095 kilowatts

 lb_{f} • ft/s  i pound force foot per second
 1 hose power = exactly 550 lb_{f} • ft/s
