How many megajoules are in 1 British thermal unit?

1 British thermal unit equals 0.00105506 MJ.

How do I convert megajoules back to British thermal units?

Use the reverse converter: 1 megajoule equals 947.817 BTU.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert British thermal units to megajoules, multiply the value by 0.00105505585.

MJ = BTU × 0.00105505585

40 BTU × 0.00105505585 = 0.0422 MJ

British Thermal Unit (BTU): Used for heating, cooling and gas in the US. The IT BTU is about 1,055.056 joules.
Megajoule (MJ): 1,000,000 joules; used for fuel and industrial energy.

How do I convert British thermal units to megajoules?: To convert British thermal units to megajoules, multiply the value by 0.00105505585.
How many megajoules are in 1 British thermal unit?: 1 British thermal unit equals 0.00105506 MJ.
How many megajoules are in 10 British thermal units?: 10 BTU equals 0.0105506 MJ.
How do I convert megajoules back to British thermal units?: Use the reverse converter: 1 megajoule equals 947.817 BTU.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.