Convert kilojoule (kJ) to BTU (BTU).
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BTU to Kilojoule Converter (BTU to kJ)
Convert BTU (BTU) to kilojoule (kJ).Unit Converter · Energy
Quick answer
1 BTU is approximately equal to 1.055056 kilojoules (kJ). 1 kilojoule (kJ) is approximately equal to 0.9478171 BTUs (BTU).
To convert BTU to kJ, multiply the value in BTUs by 1.0550558526. For example, 10 BTU = 10.55055853 kJ, and 100 BTU = 105.50558526 kJ.
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Quick reference — BTU to kilojoule
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How to convert BTUs to kilojoules
How many kilojoules are in a BTU? 1 BTU is about 1.055056 kilojoules. This free BTU to kJ converter and BTU to kilojoule calculator gives the answer instantly for any value.
To convert BTU (BTU) to kilojoule (kJ), multiply the value in BTUs by 1.0550558526.
kJ = BTU × 1.0550558526
- 1
Take the value in BTUs
For example, 25 BTU.
- 2
Multiply by 1.0550558526
25 × 1.0550558526.
- 3
Read the answer in kilojoules
25 BTU = 26.37639632 kJ.
BTU to Kilojoule conversion table
Common values from 1 to 1,000 BTUs converted to kilojoules.
| BTU (BTU) | Kilojoule (kJ) |
|---|---|
| 1 BTU | 1.05505585 kJ |
| 2 BTU | 2.11011171 kJ |
| 3 BTU | 3.16516756 kJ |
| 4 BTU | 4.22022341 kJ |
| 5 BTU | 5.27527926 kJ |
| 6 BTU | 6.33033512 kJ |
| 7 BTU | 7.38539097 kJ |
| 8 BTU | 8.44044682 kJ |
| 9 BTU | 9.49550267 kJ |
| 10 BTU | 10.55055853 kJ |
| 15 BTU | 15.82583779 kJ |
| 20 BTU | 21.10111705 kJ |
| 25 BTU | 26.37639632 kJ |
| BTU (BTU) | Kilojoule (kJ) |
|---|---|
| 30 BTU | 31.65167558 kJ |
| 40 BTU | 42.2022341 kJ |
| 50 BTU | 52.75279263 kJ |
| 60 BTU | 63.30335116 kJ |
| 70 BTU | 73.85390968 kJ |
| 75 BTU | 79.12918895 kJ |
| 80 BTU | 84.40446821 kJ |
| 90 BTU | 94.95502674 kJ |
| 100 BTU | 105.50558526 kJ |
| 250 BTU | 263.76396316 kJ |
| 500 BTU | 527.52792631 kJ |
| 1,000 BTU | 1,055.05585262 kJ |
About BTUs and kilojoules
BTU (BTU)
A British thermal unit (BTU) is about 1,055 joules. It is used to rate air conditioners and heaters.
Kilojoule (kJ)
A kilojoule (kJ) is 1,000 joules. Food energy on nutrition labels is often shown in kJ as well as kcal.
BTU to kJ: common questions
- How many kilojoules are in 1 BTU?
- 1 BTU is approximately equal to 1.055056 kilojoules (kJ). In short: 1 BTU ≈ 1.055056 kJ.
- How do I convert BTUs to kilojoules?
- To convert BTU to kJ, multiply the value in BTUs by 1.0550558526. For example, 5 BTU = 5.27527926 kJ.
- How do I convert kilojoules to BTUs?
- To convert kJ to BTU, divide the value in kilojoules by 1.0550558526. Or open the Kilojoule to Btu converter, which does it for you.
- What is 10 BTU in kJ, and what is 100 BTU?
- 10 BTU = 10.55055853 kJ, and 100 BTU = 105.50558526 kJ. The table above lists more values from 1 to 1,000.
- Is this BTU to kJ converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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