![]() ![]() ![]() A kilowatt hour therefore refers to the consumption of your device.ġ kilowatt hour (kWh) is the energy consumed by a 1,000-watt or 1-kilowatt electrical appliance operating for 1 hour.Ī 60 W lamp that burns for one hour will have consumed 60 Wh or 0.06 kWhĪ 900 W microwave oven that runs for 5 minutes will have consumed 75Wh or 0. A kilowatt hour therefore refers to the consumption of your device. Kilowatt hours (kWh) A kilowatt hour (kWh) is a unit of measurement of energy. Here is a list of appliances with their power (in watts) and their consumption (in kWh).Ī kilowatt hour (kWh) is a unit of measurement of energy. 1 kilowatt (kW) 1,000 watts (W) 1 megawatt (MW) 1,000 kilowatts (kW) 1 gigawatt (GW) 1,000 megawatts (MW) Here is a list of appliances with their power (in watts) and their consumption (in kWh). The more powerful a device is, the higher the number of watts. Today, this information appears on the technical descriptions for all electrical appliances. – measures the electrical power of a device, whether it is a motor, a machine or the heating capacity of a boiler or wood stove. The watt, as its many variations – kilowatt, megawatt, etc. We usually pay for our electrical energy based on. ![]() Your microwave oven has a maximum power of 900 W A watt (W) measures the rate at which energy is produced or consumed. Watts therefore refer to the power of your device. The watt as a unit of power should not be confused with its energy counterpart, the watt-hour (and all its multiples/submultiples).The difference is quite simple, but many people muddle them up.Ī watt (W) is a unit of measurement of power. The absolute watt was adopted as the SI unit of power in 1960.Ĭurrent use: As the SI derived unit of power, the watt in all its multiples and submultiples is used in many applications worldwide from radio transmission to use in the electric power industry. 1 absolute watt is equal to 1.00019 international watts. These were used until 1948 when the General Conference on Weights and Measures re-defined the watt to absolute units, using only mass, time, and length. In 1908, the "international" definitions were defined, with Siemens' definition being adopted as the international watt. It was first proposed in 1882 by William Siemens who defined it as "the power conveyed by a current of an Ampere through the difference of potential of a Volt." This was the definition used at the time within the existing system of units. Here’s the Formula for Calculating Watts Into Kilowatt-Hours: kWh (watts × hrs) 1,000 For example, to find the kWh of 1,200 watts for 3 hours: kWh (1,200 × 3) 1,000 kWh 3,600 1,000 kWh 3. ![]() History/origin: The watt is named after James Watt, a Scottish inventor. Formula: multiply the value in kilowatts by the conversion factor 1000. It is defined as 1 joule per second and is used to quantify the rate of energy transfer. Wattĭefinition: A watt (Symbol: W) is the SI (International System of Units) derived unit of power. Megawatt or gigawatt hours may be used in larger buildings or for industrial applications. P(W) 1000 x E(kWh) / t(h) The power P in watts (W) is equal to 1000, multiplied by the energy E in kilowatt-hours (kWh), divided by the consumption time period t in hours (h). Electricity used by a home is typically measured in kilowatt hours, or kWh, meaning 1000 watts being applied over a period of one hour. He defined the unit within the system of units being used at the time, and his definition was adopted in 1908.Ĭurrent use: Kilowatts are used worldwide, typically to express the output power of engines and the power of electric motors, tools, machines, and heaters. This was first proposed in 1882 by Sir Charles William Siemens, an engineer and entrepreneur, who suggested the use of Watt's name as a unit of power. Formula: watts kilowatt hours × 1000 ÷ hours Abbreviated: W kWh × 1000 ÷ hrs Calculator: Kilowatt Hours to Watts Calculator Example Lets say your power bill says you consumed 18 kWh on a particular day. Wh kilowatt hour kWh watt hour 1000 Wh Conversion base : Wh Conversion base : 1 Wh 0. History/origin: The base unit of the kilowatt is the watt, which was named after a Scottish inventor named James Watt. To convert kilowatt hours to watts, multiply kilowatt hours times 1000 then divide by hours. As is consistent with SI units, the prefix kilo- means that a kilowatt equals one thousand watts or one thousand joules per second. The base unit of the kilowatt is the watt, which was named after Scottish inventor James Watt. Definition: A kilowatt (symbol: kw) is a unit of power in the International System of Units (SI). ![]()
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