Quick Answer
1 British thermal unit equals 1,055.06 joules. To convert btu to joules, multiply the value by this factor.
Key Facts
- Reverse: 1 joule = 0.000947817 btu.
BTU to Joules Converter
Free instant BTU → J converter. No signup, no uploads — everything is calculated privately in your browser.
1 BTU = 1,055.06 joules
Free and instant — every calculation runs in your browser. Nothing is uploaded.
BTU to Joules Formula
Formula: value × 1,055.06
Prefer to skip the math? Type any value in the converter above and it converts instantly.
BTU to Joules Conversion Table
| BTU (BTU) | Joules (J) |
|---|---|
| 1 BTU | 1,055.06 J |
| 2 BTU | 2,110.11 J |
| 5 BTU | 5,275.28 J |
| 10 BTU | 10,550.6 J |
| 25 BTU | 26,376.4 J |
| 50 BTU | 52,752.8 J |
| 100 BTU | 105,506 J |
| 250 BTU | 263,764 J |
| 500 BTU | 527,528 J |
| 1,000 BTU | 1,055,056 J |
Frequently Asked Questions
How do I convert btu to joules?
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value × 1,055.06.
What is the exact btu to joules conversion factor?
1 British thermal unit = 1,055.06 joules (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 joule = 0.000947817 btu.
What are some common btu to joules conversions?
1 BTU = 1,055.06 J; 10 BTU = 10,550.6 J; 100 BTU = 105,506 J. 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