Fuel Efficiency (volume) Converter
Fuel efficiency by volume — energy density — is how much energy a given volume of fuel holds. Natural-gas billing works in BTU or therms per cubic foot, while metric practice uses megajoules per cubic meter. The reciprocal units express volume consumed per unit of energy delivered.
15 units supported Base unit joule per cubic meter (J/m³)
Multiply the number of joules per cubic meter by 0.000001 to get megajoules per cubic meter. How this is calculated
About fuel efficiency (volume) conversion
Fuel Efficiency (volume) conversion is commonly needed when gas heating values, fuel specification, and generator sizing. Pipeline natural gas is roughly 1,030 BTU per cubic foot, or about 38 megajoules per cubic metre.
Convert Joule per Cubic Meter to other fuel efficiency (volume) units
1 J/m³ expressed in every other fuel efficiency (volume) unit on this site.
- Joule per Cubic Meter J/m³ 1
- Joule per Liter J/L 0.001
- Kilojoule per Cubic Meter kJ/m³ 0.001
- Megajoule per Cubic Meter MJ/m³ 0.000001
- Kilocalorie (IT) per Cubic Meter kcal/m³ 0.0002388459
- Calorie (IT) per Cubic Centimeter cal/cm³ 2.388459e-7
- Therm per Cubic Foot therm/ft³ 2.6839086e-10
- Therm per Gallon (UK) therm/gal (UK) 4.308845e-11
- BTU (IT) per Cubic Foot BTU/ft³ 0.000026839192
- BTU (th) per Cubic Foot BTU(th)/ft³ 0.000026857153
- CHU per Cubic Foot CHU/ft³ 0.000014910662
- Cubic Meter per Joule m³/J 1
- Liter per Joule L/J 1,000
- Liter per Kilowatt-hour L/kWh 3,600,000,000
- Gallon (US) per Horsepower-hour gal/(hp·h) 709,175,040
Complete list of fuel efficiency (volume) units
All 15 units this converter supports, each stated against the joule per cubic meter (J/m³).
| Unit | Symbol | System | In joules per cubic meter | Conversions |
|---|---|---|---|---|
| Joule per Cubic Meter | J/m³ | SI | base unit (J/m³) | — |
| Joule per Liter | J/L | SI | 1 J/L = 1,000 J/m³ | — |
| Kilojoule per Cubic Meter | kJ/m³ | SI | 1 kJ/m³ = 1,000 J/m³ | — |
| Megajoule per Cubic Meter | MJ/m³ | SI | 1 MJ/m³ = 1,000,000 J/m³ | — |
| Kilocalorie (IT) per Cubic Meter | kcal/m³ | Metric | 1 kcal/m³ = 4,186.8 J/m³ | — |
| Calorie (IT) per Cubic Centimeter | cal/cm³ | Metric | 1 cal/cm³ = 4,186,800 J/m³ | — |
| Therm per Cubic Foot | therm/ft³ | Imperial | 1 therm/ft³ = 3,725,909,227.12 J/m³ | — |
| Therm per Gallon (UK) | therm/gal (UK) | Imperial | 1 therm/gal (UK) = 23,208,075,511 J/m³ | — |
| BTU (IT) per Cubic Foot | BTU/ft³ | Imperial | 1 BTU/ft³ = 37,258.9458078 J/m³ | — |
| BTU (th) per Cubic Foot | BTU(th)/ft³ | Imperial | 1 BTU(th)/ft³ = 37,234.0281981 J/m³ | — |
| CHU per Cubic Foot | CHU/ft³ | Imperial | 1 CHU/ft³ = 67,066.1024541 J/m³ | — |
| Cubic Meter per Joule | m³/J | SI | 1 m³/J = 1 J/m³ (non-linear scale) | — |
| Liter per Joule | L/J | SI | 1 L/J = 1,000 J/m³ (non-linear scale) | — |
| Liter per Kilowatt-hour | L/kWh | SI | 1 L/kWh = 3,600,000,000 J/m³ (non-linear scale) | — |
| Gallon (US) per Horsepower-hour | gal/(hp·h) | US | 1 gal/(hp·h) = 709,175,040 J/m³ (non-linear scale) | — |
No unit in this category matches that search.
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Frequently asked questions
What is the base unit for fuel efficiency (volume)?
Fuel Efficiency (volume) conversions on this site are calculated against the joule per cubic meter (J/m³).
Which fuel efficiency (volume) units can I convert?
You can convert between 15 units, including joule per cubic meter, joule per liter, kilojoule per cubic meter, megajoule per cubic meter, and more.
Where is fuel efficiency (volume) conversion useful?
It is commonly needed when gas heating values, fuel specification, and generator sizing.
Does this converter mix measurement systems?
The converter supports SI, Metric, Imperial, US units and keeps their exact definitions separate so results stay accurate.
Related categories
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.