Energy Density (Heating Value per Volume) Converter
Convert between 9 energy density units instantly. Enter a value, pick your units and get the result with the formula, a full conversion table and worked examples.
1,000 BTU/ft³ in all energy density units
Updates live as you type. Click a row to set it as the target unit.
| Unit | Symbol | Value |
|---|---|---|
| Joule per cubic metre | J/m³ | 37,258,900 |
| Kilojoule per cubic metre | kJ/m³ | 37,258.9 |
| Joule per litre | J/L | 37,258.9 |
| Kilocalorie per cubic metre | kcal/m³ | 8,899.15 |
| BTU per cubic foot | BTU/ft³ | 1,000 |
| BTU per gallon (US) | BTU/gal | 133.681 |
| Megajoule per cubic metre | MJ/m³ | 37.2589 |
| Kilowatt hour per cubic metre | kWh/m³ | 10.3497 |
| Megajoule per litre | MJ/L | 0.0372589 |
How to Convert Energy Density Units
Energy density is energy per unit volume, used for gas and liquid fuel heating values. The SI unit is joule per cubic metre (J/m³); natural gas is commonly quoted in MJ/m³ or BTU/ft³.
Every unit on this page is stored as a fixed factor relative to one reference unit, the joule per cubic metre (J/m³). Converting is a two step multiply and divide:
- Multiply your value by the factor of the source unit to get the value in J/m³.
- Divide that result by the factor of the target unit.
BTU per cubic foot to Megajoule per cubic metre conversion table
| BTU per cubic foot (BTU/ft³) | Megajoule per cubic metre (MJ/m³) |
|---|---|
| 1 BTU/ft³ | 0.0372589 MJ/m³ |
| 2 BTU/ft³ | 0.0745179 MJ/m³ |
| 3 BTU/ft³ | 0.111777 MJ/m³ |
| 4 BTU/ft³ | 0.149036 MJ/m³ |
| 5 BTU/ft³ | 0.186295 MJ/m³ |
| 6 BTU/ft³ | 0.223554 MJ/m³ |
| 7 BTU/ft³ | 0.260813 MJ/m³ |
| 8 BTU/ft³ | 0.298072 MJ/m³ |
| 9 BTU/ft³ | 0.335331 MJ/m³ |
| 10 BTU/ft³ | 0.372589 MJ/m³ |
| 15 BTU/ft³ | 0.558884 MJ/m³ |
| 20 BTU/ft³ | 0.745179 MJ/m³ |
| 25 BTU/ft³ | 0.931474 MJ/m³ |
| 30 BTU/ft³ | 1.11777 MJ/m³ |
| 40 BTU/ft³ | 1.49036 MJ/m³ |
| 50 BTU/ft³ | 1.86295 MJ/m³ |
| 75 BTU/ft³ | 2.79442 MJ/m³ |
| 100 BTU/ft³ | 3.72589 MJ/m³ |
| 250 BTU/ft³ | 9.31474 MJ/m³ |
| 500 BTU/ft³ | 18.6295 MJ/m³ |
| 1,000 BTU/ft³ | 37.2589 MJ/m³ |
Energy Density Units and Conversion Factors
Value of one unit expressed in J/m³.
| Unit | Symbol | In J/m³ |
|---|---|---|
| Joule per cubic metre | J/m³ | 1 |
| Kilojoule per cubic metre | kJ/m³ | 1,000 |
| Joule per litre | J/L | 1,000 |
| Kilocalorie per cubic metre | kcal/m³ | 4,186.8 |
| BTU per cubic foot | BTU/ft³ | 37,258.94581 |
| BTU per gallon (US) | BTU/gal | 278,716.2699 |
| Megajoule per cubic metre | MJ/m³ | 1,000,000 |
| Kilowatt hour per cubic metre | kWh/m³ | 3,600,000 |
| Megajoule per litre | MJ/L | 1,000,000,000 |
Frequently Asked Questions
What is the SI unit of energy density?
The SI unit of energy density is the joule per cubic metre (J/m³). Energy density is energy per unit volume, used for gas and liquid fuel heating values.
How do I convert BTU/ft³ to MJ/m³?
To convert btu per cubic foot (BTU/ft³) to megajoule per cubic metre (MJ/m³), multiply the value in BTU/ft³ by 0.0372589. For example, 1 BTU/ft³ = 0.0372589 MJ/m³.
How do I convert MJ/m³ to BTU/ft³?
To convert megajoule per cubic metre (MJ/m³) to btu per cubic foot (BTU/ft³), multiply the value in MJ/m³ by 26.8392. For example, 1 MJ/m³ = 26.8392 BTU/ft³.
How do I convert kcal/m³ to MJ/m³?
To convert kilocalorie per cubic metre (kcal/m³) to megajoule per cubic metre (MJ/m³), multiply the value in kcal/m³ by 0.0041868. For example, 1 kcal/m³ = 0.0041868 MJ/m³.
Can I see a value in every energy density unit at once?
Yes. Enter a value and choose the source unit; the "all units" table below the converter instantly lists the equivalent in all 9 supported units. Click any row to make it the target unit.
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