$/dth
per dekatherm
Cost per energyexact by definition
Cost per dekatherm, the dekatherm being ten therms or exactly 1.05505585262e9 joules. It is the billing unit in United States natural gas tariffs and pipeline contracts, and it is numerically the same energy as one million BTU. The conversion is exact, the international BTU being exactly 1055.05585262 joules.
Watch out: A dekatherm is an energy and an Mcf is a volume, and gas is sold in both. They are close but not equal, since a thousand cubic feet of pipeline gas carries roughly 1.02 to 1.10 million BTU depending on composition. Utilities apply a therm factor to convert the meter reading, and it changes with the gas actually delivered.
| 1 $/dth | 0.0034121416 $/kWh |
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