How to calculate kilowatt hours. If you used the example appliance in step 3 for 20 hours a day you would use 288 kilowatt hours. In this situation look for an amp. Kw 48 kwh 24 hours.
How to calculate kilowatt hour cost. Find the voltage in your region. Lets be honest sometimes the best kilowatt hour cost calculator is the one that is easy to use and doesnt require us to even know what the kilowatt hour cost formula is in the first place.
Calculation of kilowatt to kilowatt hours e kwh p kw x t hr which means that the energy in kilowatt hours is calculated by multiplying the power in kilowatts by the time in hours. Find the amps rating on your appliance. So the power in kilowatts is equal to the energy in kilowatt hours divided by the time period measured in hours.
Multiply kilowatts by the number of hours used to find kilowatt hours. 60w divided by 1000 results in 006kw. Calculating kilowatt hours from amps and voltage 1.
In the united states and a few other countries the standard household voltage is. Formula to calculate kilowatt hour. An led bulb that can make as much light as a 100 watt incandescent bulb only needs 14 watts.
Ekwhday pw thday 1000 wkw. Some appliance labels do not list watts. But if you want to know the exact formula for calculating kilowatt hour cost then please check out the formula box.
A kilowatt of power kw is 1000 watts so if you leave 10 100 watt bulbs 1 kw of bulbs on for an hour youll have used one kilowatt hour kwh. If the device will be used for three hours multiply 006kw by three to produce 018kwh. For example lets convert 48 kwh of energy consumption over a 24 hour time period to kw.
This is one reason why switching to low wattage light bulbs can have such a great impact. How to convert watts to kilowatt hours. The kilowatt hour kwh is a unit of energy equivalent to one kilowatt 1 kw of power expended for one hour 1 h of time.
Use the following formula to calculate kwh. The energy e in kilowatt hours kwh per day is equal to the power p in watts w times number of usage hours per day t divided by 1000 watts per kilowatt. A kilowatt hour expressed as kwh or kwh is a measure of energy that is equivalent to 1000 watts of power for a 1 hour time period.
Divide the number of watts by 1000 to convert the number from watts to kilowatts.
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How To Calculate Kilowatt Hours Most Household Appliances Have A Wattage Label On The Back Or Bottom This Label Lists The Maxim Motivation Student Energy Use
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