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Energy Usage Calculators

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Below are energy calculators you can use to determine approximate cost of operating appliances and electronics. You can calculate daily, monthly, and yearly cost whether they are on, off, or in idle mode. With these calculators you can:

Energy Usage Calculator Example

How much would it cost to have a 23 watt bulb on for 12 hours a day using a $0.1145 kWh rate?

  1. Enter electric rate for using $0.1145 kWh rate .1145
  2. Enter watts of CFL 23
  3. Enter number of hours of operation per day 12
  4. The resultant cost in $03/day, .95/month, 11.53/year

Example

Average Electric Rates by State

Energy Usage Calculator using Watts

Energy Usage Calculator using Amps

120V Power Converter

Amps
equals
Watts

240V Power Converter

Amps
equals
Watts

Enter a number in either the amps or watts boxes.

$ Electric
Rate
Watts
Hours/
Day
$ Cost/
Day
$ Cost/
Month
$ Cost/
Year
$ Electric
Rate
Amps
Hours/
Day
$ Cost/
Day
$ Cost/
Month
$ Cost/
Year
Energy Calculator Example