Propane vs. natural gas cost comparison


Propane contains more than twice the energy of natural gas (one cubic foot of propane = 2,516 BTUs, while one cubic foot of natural gas = 1,030 BTUs), it’s much more efficient than natural gas. For example, in one hour a 100,000 BTU natural gas furnace burns around 97 cubic feet, while a propane furnace burns only 40 cubic feet in an hour.


If the natural gas cost is $15.00 per 1,000 cubic feet, the same $15.00 will purchase around one million BTUs, this is the equivalent of slightly over 11.20 gallons of propane. If propane costs $2.50 per gallon, in this example, natural gas is the cheaper alternative.  For $15.00 of natural gas, you would get the same BTUs as $28.00 worth of propane.


Thus, if the Utah Group got 1 kWH of power for $0.03, it is reasonable to assume the same power would be produced by $0.016 of natural gas.