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Fuel Efficiency — Volume Converter

Convert energy-per-volume: J/m³, BTU/ft³, therm/gal.

6 units
6 decimals

1 J/m³ = 0.000027 BTU/ft³

About the fuel efficiency — volume converter

Convert energy per unit volume between J/m³, kJ/m³, MJ/m³, BTU/ft³, cal/cm³, and therm per gallon. Volumetric energy density rates fuels, batteries, and storage media — e.g. how much usable energy a tank of natural gas or a liter of gasoline contains.

Frequently asked questions

  • How many J/m³ is 1 BTU/ft³?

    One BTU per cubic foot equals approximately 37,259 J/m³.

  • What is a therm?

    A therm is 100,000 BTU — a common unit for natural-gas billing in the US and UK.

  • What is the SI unit of energy density?

    The joule per cubic meter (J/m³).

More heat converters

Fuel Efficiency — Mass → Temperature Interval → Thermal Expansion → Thermal Resistance → Thermal Conductivity → Specific Heat Capacity → Heat Density → Heat Flux Density →

Complete list of fuel efficiency — volume units