Natural Gas Measurement
Compressed natural gas (CNG) and liquefied natural gas (LNG) used for transportation must be sold in gasoline gallon equivalents (GGE) or diesel gallon equivalents (DGE) prescribed by the state, unless equivalent measures are established by the National Conference on Weights and Measures. According to current state law, one GGE is equal to 5.66 pounds (lbs.) of CNG. One DGE is equal to 6.06 lbs. of LNG.
(Reference Tennessee Code 47-26-91)