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Energy Usage FAQ

Energy Usage FAQ

How much does OPPD charge for electricity?

OPPD’s average annual electric cost for residential customers is $.1125 for every kWh (kilowatt-hour) of electricity used.


What affects the cost of electricity?

That depends on many variables, including:

  • Rates. Depending on where you live, each utility has different rates.
  • Energy efficiency of your home and appliances.
  • Behaviors/lifestyle. Includes the number of people in your home, the number of electronics and appliances, and how much you use those devices.
  • Time of year. Generally, summer rates are higher than winter rates.

How is electric consumption measured?

By kilowatt-hour (kWh), which is 1,000 watts of electricity used for one hour. For example, ten 100-watt lightbulbs running for one-hour would equal one kilowatt-hour. Your electric bill reflects the total kWh used during your billing period.


What’s the difference between a watt and a kilowatt-hour?

A watt is the rate of electric use by an appliance at the instant it is measured. Lights, appliances and electronics have various watt ratings. A 100-watt light bulb uses twice as much energy as a 50-watt light bulb in that same instant.

One kilowatt equals 1,000 watts.

Kilowatt-hours represent the amount of electric usage over a one-hour period. If you use 1,000 watts of electricity for one hour, that equals one kilowatt-hour of usage.


How do you calculate kilowatt-hours?
  1. Multiply the wattage of an electric device by the number of hours you use it.
  2. Divide that number by 1,000. That will convert the number from watt-hours to kilowatt-hours.
  3. Multiply the number of kilowatt-hours (kWh) by the cost per kWh to determine the cost of using that device. 

Formula:Watts x hours used ÷ 1,000 x cost per kWh = cost of electricity used

Example: Assume your home uses a 2,000-watt window air conditioner, which runs for eight hours, and you pay $.1125 per kWh.

  • 2,000 x 8 ÷ 1,000 x $.1125 = $1.80
  • The cost to run the window AC for eight hours is $1.80

How much electricity do lights and appliances use?

Lights and appliances use electricity at different rates, and are rated by their wattage. Generally, the older and/or the less efficient the appliance, the more watts and thus kilowatt-hours (kWh) it will use. See the examples below.

Appliance Wattage   Hours/Day     kWh     Monthly kWh  
Window air conditioner (medium size)      1,000 watts     10   10 300
42-inch plasma TV 270 watts 10 2.7 81
Incandescent lightbulb (100 watts) 100 watts 10 1 30
Compact fluorescent lightbulb (25 watts)   25 watts 10 0.25 7.5
Light emitting diode (19 watts) 19 watts 10 0.19 5.7


Use the OPPD appliance calculator to estimate energy use for a number of different appliances and lights.


Can I look at my energy bill and usage on line?

Yes, just go to MyAccount

  • Log in with your ID and Password
  • If a new user, click on New to MyAccount? to register
  • Once logged in, click and view your Account Information
  • You can then view your historical energy billing by individual month

Have other home energy usage questions?

If you have other questions, please email energyadvisor@oppd.com, and you will be contacted by the next business day. You also can call an energy advisor at 402-636-3850 in Omaha or 800-648-2658 outside the metro, or visit the Energy Advisor webpage.