Understanding kWh (kilowatt hour)
- One kilowatt equals 1,000 watts
- The cost of using a 100 watt bulb for 10 hours equals 1 kWh
Our average cost per kWh for the average residential customer is 12¢. To calculate the average cost of electricity, use the example below:
To operate a 40 watt bulb for 24 hours:
40 watt bulb x 24 hours = 960 watts
960 watts = .96 kWh
.96 kWhx 12¢ = 11.52¢
Estimating the monthly cost of electric appliances
- Determine the wattage used by the appliance and estimate the number of hours used per month. Wattage information can usually be found on the back or bottom of the appliance.
- Use the following formula inserting 12¢ for your electric rate and 30 for the number of days in a month.
Wattage x hours used per day x 30 days x rate = estimated cost
Examples of wattage:
|16 cubic ft refrigerator