Inputs
Results
| # | Timestamp | CCF | Method | Factor / BTU·ft⁻³ | Correction | Therms | MMBtu |
|---|
1 therm = 100,000 BTU = 0.1 MMBtu. MMBtu = therms / 10.
Example data
Illustrative conversions using common values; update your utility’s actual factor or heating value for billing accuracy.
| # | CCF | Method | Factor / BTU·ft⁻³ | Correction | Therms | MMBtu |
|---|---|---|---|---|---|---|
| 1 | 25 | factor | 1.036 | 1.000 | 25.900 | 2.590 |
| 2 | 100 | hv | 1030 | 1.000 | 103.000 | 10.300 |
| 3 | 75 | factor | 1.020 | 1.000 | 76.500 | 7.650 |
| 4 | 40 | hv | 1020 | 1.000 | 40.800 | 4.080 |
| 5 | 60 | hv | 1040 | 1.000 | 62.400 | 6.240 |
Formula used
- Therm factor method:
therms = CCF × thermFactor × correction - Heating value method:
therms = CCF × (BTU_per_ft³ / 1000) × correction
Because 1 CCF = 100 ft³ and 1 therm = 100,000 BTU, the heating value method simplifies to BTU_per_ft³ ÷ 1000.
MMBtu = therms ÷ 10. Values shown are estimates; for billing reconcile to your utility’s statement.
How to use this calculator
- Enter your usage in CCF from the meter or bill.
- Pick a method:
- Therm factor — use the factor printed on the bill (therms per CCF).
- Heating value — enter the higher heating value (BTU per ft³) if your bill lists BTU or energy content.
- Optionally apply a correction factor for temperature or pressure adjustments if provided by your utility.
- Select Calculate. Your result is appended to the table.
- Export your records with Download Results CSV or Download Results PDF.
FAQs
CCF stands for one hundred cubic feet of natural gas. Many utilities bill consumption in CCF, then convert to therms with a factor that reflects energy content.
Gas composition and conditions vary slightly by region and season. Utilities publish a therm factor or BTU per ft³ so bills reflect the actual delivered energy content.
Higher heating value for pipeline natural gas often sits near 1,020–1,040 BTU per ft³, but you should use the exact value or factor printed on your bill.
A therm is 100,000 BTU. One MMBtu is one million BTU. Therefore, 10 therms equal 1 MMBtu. The calculator shows both for convenience.
Yes. Some utilities apply temperature or pressure adjustments. If your bill lists a multiplier, enter it as the correction factor to align results with billing.
No personal data is stored. All calculations run in your browser.