Power and Energy
BTUtoJ
Convert International Table BTUs (BTU) to joules (J).
Factor1 BTU = 1055.056 J
Converter
BTU
Accepts numbers or expressions, e.g. 150 + 14.7
Result
J
Rendered to 6 significant figures.
Formula
Formula
J = BTU × 1055.056
Multiply any value in International Table BTUs by 1055.056 to obtain the value in joules.
Worked example
Convert 1000 BTU to J.
- 01Start with 1000 BTU.
- 02Multiply by the conversion factor: 1000 × 1055.056 = 1.05506e+6 J.
Result1000 BTU = 1.05506e+6 J
Conversion table
| BTU | J |
|---|---|
| 1 | 1055.1 |
| 2 | 2110.1 |
| 5 | 5275.3 |
| 10 | 10551 |
| 20 | 21101 |
| 50 | 52753 |
| 100 | 1.0551e+5 |
| 200 | 2.1101e+5 |
| 500 | 5.2753e+5 |
| 1000 | 1.0551e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from BTU to J?
1 BTU equals 1055.056 J. To convert, multiply the value in International Table BTUs by 1055.056.
How do I convert 1 BTU to J?
1 BTU = 1055.06 J. For any value, multiply by 1055.056.
How do I convert J back to BTU?
Divide by the same factor — or equivalently, multiply by 0.0009478171. So 1 J = 0.000947817 BTU.
When would I need to convert International Table BTU to joule?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).