Natural Gas Unit Converter
Energy & PowerConvert natural gas units between therms, CCF, BTU, cubic metres, and kWh — useful for reading utility bills and comparing gas energy content.
From
To
All conversionsfor 1 CCF (hundred cubic feet)
| British Thermal Units (BTU) | 103700 |
| Therms | 1.037 |
| CCF (hundred cubic feet) | 1 |
| Cubic Metres (m³) | 2.9375938 |
| Kilowatt-Hours (kWh) | 30.391485 |
What is a Natural Gas?
The Natural Gas Unit Converter translates between the units that show up on gas utility bills — therms and CCF — and general energy units like BTU, cubic metres, and kilowatt-hours. Gas meters typically measure raw volume in cubic feet, but utilities bill customers in therms (a heat-energy unit), and the conversion between the two depends on the specific heat content of the gas supplied, which varies slightly by region and season.
This tool uses standard industry approximations to bridge that gap, so you can move between whatever unit your bill, meter, or reference document uses. For general (non-gas-specific) energy conversions like joules, calories, or kWh, see the Energy Converter.
How to use this Natural Gas calculator
- Choose your starting unit from the source dropdown — for example, "CCF (hundred cubic feet)".
- Enter the numeric value from your gas bill or reference document in the input field.
- Choose your target unit from the destination dropdown — for example, "Therms".
- Read the converted result, which updates instantly as you type or change units.
- Use the swap (⇅) button if you need to reverse the conversion direction.
- Use the copy button to grab the result for a bill comparison, report, or spreadsheet.
Formula & Methodology
The converter's base unit is the British Thermal Unit (BTU). Each supported unit has a fixed multiplier to BTU: - 1 therm = 100,000 BTU (exact, by definition) - 1 CCF ≈ 103,700 BTU (using the common approximation of 1.037 therms per CCF) - 1 cubic metre of natural gas ≈ 35,301 BTU (standard approximate heat content) - 1 kWh = 3,412.14 BTU (exact) Any conversion follows: Result = Input × (toBase of source unit ÷ toBase of target unit) Worked example — converting 50 CCF (a typical monthly residential gas bill) to therms: Result = 50 × (103,700 ÷ 100,000) = 50 × 1.037 = 51.85 therms This matches the typical CCF-to-therm relationship shown on most US natural gas utility bills.
Frequently Asked Questions
A therm is a unit of heat energy equal to 100,000 British Thermal Units (BTU), and it's the standard billing unit many US natural gas utilities use on residential bills. Utilities typically meter gas usage in cubic feet and then convert it to therms using a local heat-content factor before charging you.
CCF stands for 'hundred cubic feet' (C is the Roman numeral for 100), and it's how many gas meters measure raw gas volume before it's converted to therms for billing. This converter uses the common approximation that 1 CCF equals roughly 1.037 therms, though your utility's exact factor may vary slightly by region and season.
Select 'CCF (hundred cubic feet)' as your source unit and 'Therms' as your target, then enter the CCF value from your gas bill — the converter applies the standard 1.037 therms-per-CCF approximation. Compare the result against your actual bill, which may use a slightly different local conversion factor.
Natural gas heat content varies slightly depending on its source and composition, so utilities publish their own conversion factor (usually close to 1.02–1.05 therms per CCF) rather than using one universal constant. This converter uses 1.037, a commonly cited industry approximation, for consistency.
One therm equals exactly 100,000 BTU by definition — this is a fixed, exact relationship, unlike the CCF-to-therm conversion, which depends on gas composition. It's the anchor unit this entire converter is built around.
Select 'Cubic Metres (m³)' as your source unit and 'British Thermal Units (BTU)' as your target — the converter multiplies by approximately 35,301, the standard approximate heat content of one cubic metre of natural gas. This is useful for comparing gas usage figures from countries that meter gas in cubic metres against US bills that use therms or CCF.
Expressing natural gas energy content in kilowatt-hours lets you directly compare gas heating costs against electric heating costs on an equal energy basis, since both are ultimately measured in the same underlying energy units. The kWh figure uses the exact BTU-to-kWh conversion (1 kWh = 3,412.14 BTU), so this part of the conversion is precise even though the CCF and cubic-metre factors are approximations.
Most US residential gas bills show usage in either CCF or therms — enter your CCF value with 'CCF' as the source and 'Therms' as the target to see the value your utility likely used to calculate your charges. If your bill is from outside the US and shows cubic metres, convert directly from 'Cubic Metres' to 'Therms' instead.
This converter uses standard industry approximations suitable for general reference and comparison, but your specific utility publishes an exact local conversion factor (sometimes called the 'BTU factor' or 'heat content factor') on your bill or their website. For a billing dispute or precise reconciliation, always use your utility's published factor rather than this converter's general approximation.
Therms and CCF are billing-specific units used almost exclusively for natural gas, while BTU and kWh are general-purpose energy units that apply to electricity, heating oil, and other energy sources too. The [Energy Converter](/energy-converter/) handles general energy unit conversions like joules, calories, and kWh without the gas-specific billing units included here.
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