How To Calculate How Much Electricity Cost Per Kwh. So for example if we have a 40 W lightbulb left on for 12 hours a day and electricity costs 15 per kilowatt-hour the calculation is. Kilowatts x Hours Kilowatt Hours or kWh.
Watts W Kilowatts kW Time in use. The above power calculator uses a simple formula to calculate annual energy usage and costs. Electricity Cost Per Year kWhyear centskWh 100 year.
1125 watts or 0001125 kW.
Wattage in Watts 1000 Hours Used Electricity Price per kWh Cost of Electricity. Where EC is the electricity cost. The same goes for other appliances in your house. 100 watts x 60 hours 6000 watt-hours of electrical energy which can alternatively be put as 6 kilowatt-hours kWh.
