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Megajoules to BTU
Convert megajoules (MJ) to BTU (BTU). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 MJ = 947.81 BTU
Megajoules to BTU Conversion Table
Common values, ready to copy:
| megajoules | BTU |
|---|---|
| 1 MJ | 947.81 BTU |
| 2 MJ | 1895.63 BTU |
| 5 MJ | 4739.07 BTU |
| 10 MJ | 9478.13 BTU |
| 25 MJ | 23695.33 BTU |
| 50 MJ | 47390.67 BTU |
| 100 MJ | 94781.34 BTU |
| 1,000 MJ | 947813.39 BTU |
Formula
BTU = megajoules × 9.47813394e+2
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
About Megajoules and BTU
Megajoules (MJ): A million joules; the unit for larger-scale energy quantities. Common uses: Daily food intake (a typical adult consumes 8-10 MJ per day), fuel energy content (gasoline ≈ 34 MJ per liter), and industrial energy.
BTU (BTU): British Thermal Unit; the energy to raise one pound of water by one degree Fahrenheit; defined as exactly 1,055.06 J. Common uses: US heating and air conditioning (a 24,000 BTU air conditioner cools roughly a 1,500 sq ft room), and US natural gas billing.
How the conversion works
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
The exact relationship is BTU = megajoules × 9.47813394e+2, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between megajoules and BTU comes up wherever energy measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.