CCF to Therms Converter
Convert CCF of natural gas to therms and back. Enter your CCF (or switch to therms) and the utility heat-content factor — about 1.037 therms per CCF — to get therms and total BTU.
Example: with Amount to convert 50 · Direction CCF → Therms · Therm factor (therms per CCF) 1.037 → Result: 51.85 therms.
- Total energy5,185,000 BTU
- Factor usedUsing 1.037 therms per CCF — varies about 1.02 to 1.06 by utility
Computed by the calculator below using its default values. Change any input to see your own numbers.
therms = CCF × factor. One CCF (100 cubic feet) of natural gas holds a little more than 100,000 BTU, so it is about 1.037 therms — but your utility prints its own factor.
Volume on the meter, energy on the bill
Your gas meter counts volume in cubic feet, and CCF simply means one hundred cubic feet. But you are billed for energy, measured in therms, where one therm is 100,000 BTU. The two are linked by how much heat a given volume of gas actually releases, which is a little above that round number.
That is why the conversion uses a factor near 1.037 rather than exactly 1. Gas composition, pressure, and elevation shift the energy content, so utilities measure it and print their own factor, commonly between about 1.02 and 1.06. Enter that number for a bill-accurate result; the default of 1.037 is a reasonable stand-in.
How it’s calculated
therms = CCF × factor; CCF = therms ÷ factor. The default factor is 1.037 therms per CCF, a common value; utilities publish their own, roughly 1.02 to 1.06. BTU = therms × 100,000, since 1 therm = 100,000 BTU.
The 1.037 factor is an approximation. Use the therm or BTU factor printed on your own bill for billing-accurate results.
CCF to therms at 1.037 per CCF
| CCF | Therms | BTU |
|---|---|---|
| 1 CCF | 1.037 therms | 103,700 |
| 10 CCF | 10.37 therms | 1,037,000 |
| 50 CCF | 51.85 therms | 5,185,000 |
| 100 CCF | 103.7 therms | 10,370,000 |
| 150 CCF | 155.55 therms | 15,555,000 |
Computed as therms = CCF × 1.037; 1 therm = 100,000 BTU. The 1.037 factor is typical; your utility prints its own.
Common mistakes
- Assuming 1 CCF = 1 therm exactly — natural gas usually carries a bit more energy, near 1.037 therms per CCF.
- Using a neighbor's factor; heat content varies by region and season, so read the number on your own bill.
- Mixing CCF (hundred cubic feet) with MCF (thousand cubic feet); 1 MCF = 10 CCF.
Frequently asked questions
How do I convert CCF to therms?
Multiply CCF by the heat-content factor, typically about 1.037. So 50 CCF × 1.037 = 51.85 therms.
Why is a CCF not exactly one therm?
A CCF is a volume (100 cubic feet) and a therm is an energy amount (100,000 BTU). Because natural gas holds slightly more than 100,000 BTU per 100 cubic feet, 1 CCF is about 1.037 therms.
Where do I find my exact factor?
Your gas utility prints a therm factor or BTU factor on the bill. It usually falls between roughly 1.02 and 1.06 and shifts with gas composition and altitude.
How many BTU is a therm?
Exactly 100,000 BTU. A therm is defined as 100,000 British thermal units.