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Thermal Technologies Energy Calculator

Enter the details of your wattage and daily use below to work out how much it costs to run:
Wattage of Appliance
How long is it used each day? Hours
Cents per KWh
Look up your state's average costs
Cost per day   $
Cost per quarter   $
Cost per year   $

Electric usage is measured in kilowatt-hours.

1 watt-hour is the equivalent of 1 watt of power used for 1 hour.

1 kilowatt-hour is the equivalent of 1000 watt-hours used for 1 hour.

Three values are needed to calculate the cost to use an appliance:

  • The power rating or wattage of the appliance. This is found on the appliance e.g. 50W or 1800W.
  • The time the appliance is switched on in hours (or minutes ÷ 60)
  • The cost per KWh.
  1. Appliance wattage ÷ 1000 = kilowatts (kW)
  2. Kilowatts × (time appliance is switched on in hours) = kilowatt hours (kWh)
  3. Kilowatt hours x cost per KWh is what you pay for that appliance to run.

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