Quick reference table
Common heat density conversions
| From | To |
|---|---|
| 1 kWh/m³ | 3.6 MJ/m³ |
| 1 MJ/m³ | 0.2777777778 kWh/m³ |
| 1 BTU/ft³ | 37.25894581 kJ/m³ |
| 1 kJ/m³ | 0.02683919199 BTU/ft³ |
How to convert heat density
Heat density (energy per volume) is used for fuels, heat storage and steam. A higher value means more energy in the same space.
Every heat density unit is a fixed multiple of one base unit, the J/m³. To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert kWh/m³ to MJ/m³, multiply by 3.6. To go the other way, divide by 3.6.
The converter above does this for you and shows the exact formula under the result.
Worked examples
Kilowatt-hours per cubic meter to Megajoules per cubic meter
| Kilowatt-hours per cubic meter (kWh/m³) | Megajoules per cubic meter (MJ/m³) |
|---|---|
| 1 kWh/m³ | 3.6 MJ/m³ |
| 2 kWh/m³ | 7.2 MJ/m³ |
| 5 kWh/m³ | 18 MJ/m³ |
| 10 kWh/m³ | 36 MJ/m³ |
| 25 kWh/m³ | 90 MJ/m³ |
| 50 kWh/m³ | 180 MJ/m³ |
| 100 kWh/m³ | 360 MJ/m³ |
| 1,000 kWh/m³ | 3,600 MJ/m³ |
Megajoules per cubic meter to Kilowatt-hours per cubic meter
| Megajoules per cubic meter (MJ/m³) | Kilowatt-hours per cubic meter (kWh/m³) |
|---|---|
| 1 MJ/m³ | 0.2777777778 kWh/m³ |
| 2 MJ/m³ | 0.5555555556 kWh/m³ |
| 5 MJ/m³ | 1.388888889 kWh/m³ |
| 10 MJ/m³ | 2.777777778 kWh/m³ |
| 25 MJ/m³ | 6.944444444 kWh/m³ |
| 50 MJ/m³ | 13.88888889 kWh/m³ |
| 100 MJ/m³ | 27.77777778 kWh/m³ |
| 1,000 MJ/m³ | 277.7777778 kWh/m³ |
Heat density units explained
| Unit | Symbol | Equals |
|---|---|---|
| Joules per cubic meter | J/m³ | 1 J/m³ = 1 J/m³ |
| Kilojoules per cubic meter | kJ/m³ | 1 kJ/m³ = 1,000 J/m³ |
| Megajoules per cubic meter | MJ/m³ | 1 MJ/m³ = 1,000,000 J/m³ |
| Kilojoules per liter | kJ/L | 1 kJ/L = 1,000,000 J/m³ |
| Kilowatt-hours per cubic meter | kWh/m³ | 1 kWh/m³ = 3,600,000 J/m³ |
| Calories per cubic centimeter | cal/cm³ | 1 cal/cm³ = 4,184,000 J/m³ |
| Kilocalories per cubic meter | kcal/m³ | 1 kcal/m³ = 4,184 J/m³ |
| BTU per cubic foot | BTU/ft³ | 1 BTU/ft³ = 37,258.9458078 J/m³ |
Popular conversions: btu/ft3 to kj/m3, kwh/m3 to mj/m3.
Frequently asked questions
How many MJ/m³ is 1 kWh/m³?
One kilowatt-hour per cubic meter is 3.6 megajoules per cubic meter.
How do I convert kWh/m³ to MJ/m³?
Multiply the value in kWh/m³ by 3.6 to get MJ/m³. For example, 10 kWh/m³ = 36 MJ/m³.
How many MJ/m³ is 1 kWh/m³?
1 kWh/m³ = 3.6 MJ/m³, and 1 MJ/m³ = 0.2777777778 kWh/m³.
Does this heat density converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.