Quick Answer
1 British thermal unit equals 1.05506 kilojoules. To convert btu to kilojoules, multiply the value by this factor.
Key Facts
- Reverse: 1 kilojoule = 0.947817 btu.
BTU to Kilojoules Converter
Free instant BTU → kJ converter. No signup, no uploads — everything is calculated privately in your browser.
1 BTU = 1.05506 kilojoules
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BTU to Kilojoules Formula
Formula: value × 1.05506
Prefer to skip the math? Type any value in the converter above and it converts instantly.
BTU to Kilojoules Conversion Table
| BTU (BTU) | Kilojoules (kJ) |
|---|---|
| 1 BTU | 1.05506 kJ |
| 2 BTU | 2.11011 kJ |
| 5 BTU | 5.27528 kJ |
| 10 BTU | 10.5506 kJ |
| 25 BTU | 26.3764 kJ |
| 50 BTU | 52.7528 kJ |
| 100 BTU | 105.506 kJ |
| 250 BTU | 263.764 kJ |
| 500 BTU | 527.528 kJ |
| 1,000 BTU | 1,055.06 kJ |
Frequently Asked Questions
How do I convert btu to kilojoules?
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value × 1.05506.
What is the exact btu to kilojoules conversion factor?
1 British thermal unit = 1.05506 kilojoules (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 kilojoule = 0.947817 btu.
What are some common btu to kilojoules conversions?
1 BTU = 1.05506 kJ; 10 BTU = 10.5506 kJ; 100 BTU = 105.506 kJ. Use the full conversion table below for more reference values.
Is a calorie the same as a food Calorie?
No — and the capital letter matters. A food Calorie (with a capital C) is a kilocalorie: 1,000 small calories. This converter treats them correctly: 1 kcal = 4.184 kJ = 1,000 cal. Energy labels on food almost always mean kilocalories, even where the label just says "calories".
Related Energy Conversions
- Joules to Kilojoules
- Joules to Calories
- Joules to Kilocalories
- Joules to Watt-hours
- Joules to Kilowatt-hours
- Joules to BTU
- Kilojoules to Joules
- Kilojoules to Calories