For example, when a light bulb with a power rating of 100W is turned on for one hour, the energy used is 100 watt hours (W·h), 0.1 kilowatt hour, or 360 kJ. This same amount of energy would light a 40-watt bulb for 2.5 hours, or a 50-watt bulb for 2 hours.
https://en.wikipedia.org/wiki/Watt
You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types.
http://www.convertunits.com/from/kilowatt+hour/to/horsepower+hour
One terawatt hour is equal to a sustained power of approximately 114 megawatts for a period of one year. The watt second is a unit of energy, equal to the joule. One kilowatt hour is 3,600,000 watt seconds. The watt second is used, for example, to rate the energy storage of flash lamps used in photography, although the term joule is generally employed.
https://en.wikipedia.org/wiki/Watt
The kilowatt hour (kWh) is a unit of energy... The Calorie is a unit of energy... And the joule (J) is a unit of energy... And these aren't the only units of energy-there's the BTU, the watt hour (Wh), the therm, and plenty of obscure units that you're unlikely to have heard of.
http://www.energylens.com/articles/kw-and-kwh
The milliwatt is equal to one thousandth (10 −3) of a watt. A typical laser pointer outputs about five milliwatts of light power, whereas a typical hearing aid for people uses less than one milliwatt. The kilowatt is equal to one thousand (10 3) watts, or one sthene-metre per second.
https://en.wikipedia.org/wiki/Watt
Energy usage and energy consumption are somewhat loose terms that can be used to refer to the rate of energy usage (e.g. 10 kW) or the total amount of energy used over a specified period (e.g. 240 kWh on Feb 21st 2010).
http://www.energylens.com/articles/kw-and-kwh
3. Divide the result by 1,000 to convert watts to kilowatts. So for example, if your large window fan is rated at 250 watts and you use it 5 hours a day, its kWh use per day is 250 (watts) * 5 (hours used per day) / 1,000 (to change watts into kilowatts) = 1.25 kWh per day. 1  4 Edit step.
http://www.wikihow.com/Calculate-Kilowatt-Hours
1 The building used 19 kW (on average) across all the Saturdays and Sundays since March 2009. ( 2 We don't need to care how many Saturdays and Sundays there were since March 2009.). 3  The building used 38 kW (on average) between 09:00 and 17:00 on 3rd May 2010.
http://www.energylens.com/articles/kw-and-kwh
We assume you are converting between kilowatt hour and horsepower hour. You can view more details on each measurement unit: kilowatt hour or horsepower hour. The SI derived unit for energy is the joule. 1 joule is equal to 2.77777777778E-7 kilowatt hour, or 3.72506141229E-7 horsepower hour. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between kilowatt hours and horsepower hours. Type in your own numbers in the form to convert the units!
http://www.convertunits.com/from/kilowatt+hour/to/horsepower+hour
A typical building uses more energy over long periods of time than it does over short periods of time: 1  On February 16th 2010 a building might have used 95 kWh. 2  Over the week starting April 12th 2010 it might have used 550 kWh. 3  From January 1st 2009 to December 31st 2009 it might have used 31,250 kWh.
http://www.energylens.com/articles/kw-and-kwh
watt to kilowatt hours
One kilowatt hour is 3,600,000 watt seconds.