Convert BTU to kilojoules. Live result, plus a quick-reference table for common values.
Multiply the BTU value by 1.05506. So 1 BTU = 1.05506 kJ, and the calculator above does it instantly for any number.
There are 1.05506 kilojoules in one BTU. The reference table shows the conversion for common values.
Yes, completely free, no sign-up, and it runs entirely in your browser, so nothing is uploaded.