Energy Usage Calculators

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:

Convert amps to watts and watts to amps.
Determine how much it costs to leave a light on for a certain amount of time.
Compare the cost of an incandescent, CFL, or LED over time.
Determine cost of phantom power usage (power is turned off).

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?

Enter electric rate for using $0.1145 kWh rate .1145
Enter watts of CFL 23
Enter number of hours of operation per day 12
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

240V Power Converter

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