Fuel Efficiency - Volume Converter

Convert between joule/cubic meter, megajoule, BTU, therm, and other energy density units with scientific precision.

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Energy Density Units Explained

Joule/Cubic Meter (J/m³)

The SI unit of energy density, representing the amount of energy per unit volume. 1 J/m³ = 0.001 J/L.

Common uses: Scientific measurements, fuel energy content calculations, material energy analysis.

Megajoule/Cubic Meter (MJ/m³)

A larger unit of energy density equal to one million joules per cubic meter. 1 MJ/m³ = 1,000,000 J/m³.

Key factor: Commonly used for fuel and energy resource assessment.

BTU/Cubic Foot (Btu/ft³)

British Thermal Unit per cubic foot, a non-SI unit used in energy density calculations. 1 Btu/ft³ ≈ 37.26 MJ/m³.

Note: Common in North American engineering and HVAC applications.

Therm/Cubic Foot (therm/ft³)

A therm equals 100,000 BTU. This unit measures energy density per cubic foot. 1 therm/ft³ = 3,725,600 Btu/ft³.

Application: Natural gas and fuel energy assessment.

Joule/Liter (J/L)

Energy per unit volume in liters. 1 J/L = 1,000 J/m³. Useful for fuel comparison.

Application: Fuel quality assessment and energy content comparison.

Typical Fuel Energy Content

  • Gasoline: Approximately 34.2 MJ/L
  • Diesel: Approximately 35.9 MJ/L
  • Natural Gas: Approximately 38.3 MJ/m³
  • Coal: Approximately 20-30 MJ/kg
  • Crude Oil: Approximately 45.3 MJ/kg