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Calculating Electricity Use


Electricity usage for household items varies, depending on the watt rating and length of time operating. To determine the electricity usage of your electrical item, use the following steps:

  1. Find the wattage rating. This is usually on a small metal plate on the back or bottom of the item. Some items list the volts and amps instead of watts. To obtain the watts, simply multiply:

(Volts x Amps = Watts)

  1. Estimate the hours per month the item is used.
  2. Using the formula below, calculate the approximate number of kilowatt-hours for each item.

watts x hours of operation = kWh
1,000 watts

Example: A 1,500 watt microwave oven with estimated use of 10 hours per month (20 minutes per day).

1500 watts x 10 hours/month = 15 kWh
1,000 watts

  1. By multiplying the number of estimated kilowatt-hours used per month by the price per kWh, you can determine the approximate operating cost per month of your electrical item.

kWh per month x price per kWh = cost per month

Example: 15 kWh per month x $.17 per kWh* = $2.58 estimated cost per month.

  1. The cost per kilowatt-hour of electricity is made up of three separate components listed below in residential accounts. Add all three together, then use that total in the above calculation.

Example:

Distribution Charge $ 0.07427
Transmission Charge $ 0.01036
Electricity Supply Charge $ 0.08712
Total Cost per kWh $0.17175


For current Transmission & Distribution charges for Bangor Hydro District Customers, visit our Residential Rates page.

To obtain current Standard Offer electricity supply charges, go to the Maine Public Utilities website.

Please Identify Your Service Area

Click on your district on the map, or select a zip code or town from the lists.

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Emera Maine provides electric delivery service to two areas – the Bangor Hydro District and the Maine Public District.

  • The Bangor Hydro District includes Hancock, Piscataquis and Washington Counties and most of Penobscot County.
  • The Maine Public District serves Aroostook County and a small piece of Penobscot County.

Because some information varies by District, please identify your District on the map above, or enter your town or zipcode. If you need information on both Districts,  switch back and forth at any time by selecting the district selector button.

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