British thermal unit (IT) to Kilojoule Converter
1 British thermal unit is exactly 1.05505585262 kilojoules. Convert British thermal units (BTU) to kilojoules (kJ) below: type a value and the result updates as you type.
BTU to kJ calculator
Result
British thermal unit (IT) to Kilojoule conversion
1 BTU = 1.05505585262 kJone British thermal unit in kilojoules
1 kJ ≈ 0.9478171203 BTUone kilojoule in British thermal units
British thermal unit (IT) (BTU): International Table BTU: exactly 1055.05585262 joules.
Kilojoule (kJ): Exactly 1000 joules.
Source:British thermal unit (IT): NIST Special Publication 811 (2008), Appendix B.8; Kilojoule: SI Brochure, 9th edition (BIPM, 2019)
How to convert British thermal units to kilojoules
To convert British thermal units to kilojoules, multiply the number of British thermal units by 1.05505585262.
Formula
kJ = BTU × 1.05505585262
Examples
- 5 BTU = 5 × 1.05505585262 = 5.2752792631 kJ
- 25 BTU = 25 × 1.05505585262 = 26.3763963155 kJ
- 100 BTU = 100 × 1.05505585262 = 105.505585262 kJ
British thermal unit (IT) to Kilojoule conversion table
| British thermal unit (IT) (BTU) | Kilojoule (kJ) |
|---|---|
| 0.1 BTU | 0.105505585262 kJ |
| 0.5 BTU | 0.52752792631 kJ |
| 1 BTU | 1.05505585262 kJ |
| 2 BTU | 2.11011170524 kJ |
| 3 BTU | 3.16516755786 kJ |
| 5 BTU | 5.2752792631 kJ |
| 10 BTU | 10.5505585262 kJ |
| 20 BTU | 21.1011170524 kJ |
| 25 BTU | 26.3763963155 kJ |
| 50 BTU | 52.752792631 kJ |
| 100 BTU | 105.505585262 kJ |
| 250 BTU | 263.763963155 kJ |
| 500 BTU | 527.52792631 kJ |
| 1000 BTU | 1055.05585262 kJ |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many kilojoules are in one British thermal unit?
- One British thermal unit is exactly 1.05505585262 kilojoules.
- How do I convert kilojoules to British thermal units?
- To convert kilojoules to British thermal units, divide the number of kilojoules by 1.05505585262. The formula is BTU = kJ ÷ 1.05505585262.
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 1.05505585262 is exact. Displayed results are only rounded when they have many decimal places.
- Which is larger, a British thermal unit or a kilojoule?
- A British thermal unit is 1.05505585262 times larger than a kilojoule. In other words, a kilojoule is about 0.9478171203 of a British thermal unit.