Question: what is the cost difference between natural gas and propane?
Answer: The U.S. average cost for propane is $2.41 per gallon. One million BTUs of natural gas is roughly 11.20 gallons of propane. Which means for the same amount of fuel, you'll pay $6.23 for natural gas and $26.99 for propane. The more efficient the fuel is, the less you'll use, which plays a role in overall cost.