$/therm
per therm
Cost per energyexact by definition
Cost per therm is the customary natural gas billing rate in the United States. A therm is exactly 100,000 international table BTU, which is exactly 105,505,585.262 joules, so the conversion is exact by definition rather than measured. A therm is about 29.3 kilowatt-hours and roughly the energy in 100 cubic feet of natural gas.
Watch out: Gas meters measure volume, usually in hundreds of cubic feet (CCF), and the utility converts to therms using a heating value that varies with gas composition and is typically between about 1.0 and 1.1 therms per CCF. A therm rate and a CCF rate are therefore not the same number, and the ratio changes month to month.
| 1 $/therm | 0.034121416 $/kWh |
Solvers that use cost per energy