Calculate your savings for switching from heating oil to natural gas. Heating oil used in last 12 months (gallons) Average price per gallon* Annual cost of Heating Oil Equivalent ccf of Natural Gas Current price per ccf of Natural Gas** Estimated annual cost of Natural Gas Estimated Annual Savings using Natural Gas *Feb. 2015 Avg. US price per GAL **Feb 2015 Avg. US price per ccf of Natural Gas This calculator is for reference only. Consult your natural gas provider for actual annual savings potential.