# How to calculate power in kwh?

1. Find your total number of energy consumed in joules and how many hours it took to consume that amount of energy. For example, assume you use 400 joules in 2 hours. 2. Divide the energy used by the time to calculate watts per hour. In the example,
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How to Calculate kWh
Your utility company probably bases your electricity bill on how many kWh, or kilowatt-hours, you use per month. Your appliances, on the other hand, may be labeled for energy usage in watts. This is the amount of electricity each appliance draws when... More »
Difficulty: Easy
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Q&A Related to "How to calculate power in kwh?"
 1. You can use your monthly bill to break down the cost of kWh for lighting. Example: 1. Total Bill = \$150.00. 2. kWh total = 1060. 3. Cost per Hour Breakdown for the Month = \$150.00 http://www.ehow.com/how_5171054_calculate-kwh-ligh...
 1. Find the wattage of the electrical items you are measuring. If the wattage is not printed on the unit, check the manual to see what the wattage is. 2. Figure out, measure or estimate http://www.ehow.com/how_8107985_calculate-kwh-watt...
 1. Look for the wattage rating of your devices. Some devices might list amps instead, which can be multiplied by voltage to calculate watts. As an example, a phone charger might be http://www.ehow.com/how_7777384_calculate-kwh-cons...
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