Enter the total volume of natural gas (choose ft³, CCF, or MCF) into the calculator to determine the equivalent therms and BTUs.
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CCF to Therms Formula
The following formula is used to convert CCF (hundred cubic feet; 1 CCF = 100 ft³) of natural gas to therms of energy (using a typical higher heating value of ≈ 1,037 BTU/ft³).
T = 1.037 \times CCF
- Where T is therms of energy
- CCF is the volume of natural gas in hundred cubic feet (1 CCF = 100 ft³)
To calculate therms from CCF, multiply the CCF by 1.037 (assumes typical natural gas HHV ≈ 1,037 BTU/ft³ and 1 therm = 100,000 BTU).
| CCF | Therms (thm) |
|---|---|
| 1/16 | 0.065 |
| ⅛ | 0.130 |
| 1/6 | 0.173 |
| ¼ | 0.259 |
| ⅓ | 0.346 |
| ⅜ | 0.389 |
| ½ | 0.519 |
| ⅝ | 0.648 |
| ⅔ | 0.691 |
| ¾ | 0.778 |
| ⅞ | 0.907 |
| 1 | 1.037 |
| 1¼ | 1.296 |
| 1⅓ | 1.383 |
| 1½ | 1.556 |
| 1¾ | 1.815 |
| 2 | 2.074 |
| 2½ | 2.593 |
| 3 | 3.111 |
| 4 | 4.148 |
| Assumes typical natural gas higher heating value ≈ 1,037 BTU/ft³. 1 CCF = 100 ft³ ≈ 103,700 BTU; 1 therm = 100,000 BTU. Therefore, 1 CCF ≈ 1.037 therms. | |
The number of therms of energy can then be converted into British thermal units (BTU) using the formula:
BTUs = T * 100,000
- Where BTU is British thermal units
What is a therm?
A therm is a unit of measure of energy, typically used when dealing with large amounts of energy. In the U.S., 1 therm is defined as 100,000 BTU.
How to convert CCF to therms?
The following example problem outlines the steps and information needed to calculate the total number of therms given the volume of natural gas.
First, determine the total volume of natural gas. For this example problem, the total volume is measured to be 500 ft³.
Next, convert cubic feet to CCF (since 1 CCF = 100 ft³).
CCF = 500 / 100
CCF = 5
Now, use the formula above to convert CCF to therms.
T = 1.037 * CCF
T = 1.037 * 5
T = 5.19 therms
Then to convert into BTUs, multiply by 100,000.
BTUs = T * 100,000
BTUs = 5.19 * 100,000
BTUs = 519,000
