Natural gas unit converter
Convert the gas your meter counts (ccf, m³) into the energy you are billed for (therms, kWh), and back.
That's 10× as much as a hot shower, while a US home’s average daily use is 1.91× more.
What it means
How much gas is that?
Uses 1,037 BTU per cubic foot, the US average heat content. Your bill states your own “therm factor” or calorific value; it can differ by a few percent.
Every unit
That gas in every unit
Learn
Three things worth knowing
-
ccf ≈ therm
1 ccf is about 1.04 therms, 30 kWh. One m³ is about 10.7 kWh.
-
Town gas to natural gas
Gas was first made from coal and sold by volume; when natural gas, with twice the energy per cubic foot, replaced it, bills switched to therms.
-
Mcf is a thousand
In gas, M means thousand (Roman mille): Mcf is 1,000 ft³ and MMcf a million, not a mega.
Shortcuts
Popular gas conversions
Background
About gas bills
A gas meter measures volume: hundreds of cubic feet (ccf) in the US, cubic meters elsewhere. You pay for energy, so the bill multiplies by the gas’s heat content: about 1.037 therms per ccf in the US, or about 10.7 kWh per m³.
A therm is 100,000 BTU; a dekatherm (10 therms) is 1 MMBtu, the wholesale unit.