Megajoules to BTU – convert MJ to BTU
Convert megajoules to BTU (MJ to BTU) for gas, heating, HVAC and fuel energy comparisons. This page opens the main energy converter with MJ → BTU pre-selected.
Open the interactive MJ → BTU converter:
Use main converter (MJ → BTU) or switch to BTU → MJOn the homepage you can also convert joules, kilojoules, kilowatt-hours and BTU in one place.
Quick reference: MJ to BTU
Using the IT BTU, 1 MJ ≈ 947.82 BTU, so: BTU = MJ × 947.82. Examples:
| Energy (MJ) | Energy (BTU, approx.) |
|---|---|
| 1 MJ | 947.8 BTU |
| 5 MJ | 4,739 BTU |
| 10 MJ | 9,478 BTU |
| 20 MJ | 18,956 BTU |
| 50 MJ | 47,391 BTU |
Why convert megajoules to BTU?
Megajoules to BTU is useful when you:
- Compare gas boiler outputs with electric heaters or heat pumps.
- Translate fuel or gas bills into BTU-based figures.
- Match HVAC specs given in BTU/hr with energy in MJ or kWh.
- Prepare reports that mix imperial and metric energy units.
Other energy converters on this site
This converter uses the International Table BTU, the most common modern definition in heating and HVAC work.
Page last updated: 4 December 2025.