Technically, power could be defined as the rate of doing work. Apart from that, power also represents strength. More the power of an appliance/object, greater is it’s strength. It can also be expressed as the multiplied product of the force applied to an object to the speed of the object moving in the direction of applied force. It is a scalar quantity that describes the time taken by a machine/ motor to deliver or consume energy. The power rating given to engines/ appliances helps to design machines for customized usage according to the requirements.

watt [W], the SI unit of power, used to express the rate of energy consumed/released by a device, for e.g. a 100 watt bulb.

1 kilowatt [kW] = 1000 watt [W], written as “kW” used to measure electricity consumption per hour.

1 horsepower [hp, hp (UK)] = 745.6998715823 watt [W], significantly expressed the output of different motors, engines or machines.

1 Btu (IT)/hour [Btu/h] = 0.2930710702 watt [W], this unit is generally used to express heat content and power of cooling/heating systems.

1 ton (refrigeration) = 3516.8528420667 watt [W], used to measure the amount of power required to freeze/melt ice in refrigeration.