1. Enter your electric rate in decimal currency (one cent = 0.01) per kilowatt-hour.Be sure to add applicable taxes. Find your rateFor example, if your electric rate is 9½ cents per kilowatt-hour, enter 0.095: /kWh 2. Enter your cost of fuel using the same decimal currency.Be sure to add applicable taxes. Select fuel and unit: Natural gas per decatherm Natural gas per therm Natural gas per MCF Natural gas per 100 cubic feet Natural gas per cubic meter Propane per gallon Propane per liter Propane per pound Propane per kilogram Heating oil per gallon Heating oil per liter 3. Enter your fuel burner's efficiency rating (10-100%)*: % *Burner efficiency, numerically equal to output BTU divided by input BTU (x100), will be specified on newer model burners.

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The validity of the results of this cost comparison will depend on the validity of your inputs. Enter real numbers to get real results.(Pay special attention to placement of decimals.)