To calculate an answer, first multiply the watts used by the hours of use. This will give you watt hours. Now divide your answer by 1000 and this will give you kWh of use. Take the kWh of use and multiply it by the cost per kilowatt that your utility company charges you per kilowatt hour. This information can be found on your electric bill or you can give them a call and ask how much they charge you per kilowatt hour.
Your are paying for the work of the electric power company and that is power in kilowatts times time in hours. You pay for "kilowatthours".
The average KWH is 0.1099 per hour. In order to determine how an electric bill is calculated for a home is to use an online calculator. This will explain how much electricity is used by different things in your home.
Look at kilowatt hours on your bill. Each of those is 1000 watts per hour.
By how many KW Hours you use
The unit of energy in an electricity bill is a kilowatt-hour, also known as a Unit. To calculate the energy in units, multiply the power in kilowatts by the time in hours.
The 12 v light should have the voltage and the power in watts printed on it. When it is running, it uses that amount of watts continuously. The energy is measured by the watt-hours, in other words the watts multiplied by the number of hours it runs for. 1000 watt hours makes 1 kilowatt-hour, which is a Unit on the electricity bill.
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A power of 10 kW or 10,000 watts means that 10,000 Joules of energy is converted every second. In 1 hour the energy expended is 10 kilowatt-hours which would appear as 10 units on the electricity bill.
It depends on the voltage. On a 120 v system that is a power of 540 watts, so the units used per day are 0.54 x 24, or 13 units.
Kilowatt hours.
.04 cents per 1000 watts. customer used 1076000 watts. 1076000/1000 x .04 = 43.03. 1076 x .04 = $43.03
Watts is smaller than kilowatts. watts is unit of power and kilowatts hour is unit of energy. Electrical devices are specified in watts where as electrical bill is for kilowatt hr use.