Quick Answer
1 British thermal unit equals 0.293071 watt-hours. To convert btu to watt-hours, multiply the value by this factor.
Key Facts
- Reverse: 1 watt-hour = 3.41214 btu.
BTU to Watt-hours Converter
Free instant BTU → Wh converter. No signup, no uploads — everything is calculated privately in your browser.
1 BTU = 0.293071 watt-hours
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BTU to Watt-hours Formula
Formula: value ÷ 3.41214
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BTU to Watt-hours Conversion Table
| BTU (BTU) | Watt-hours (Wh) |
|---|---|
| 1 BTU | 0.293071 Wh |
| 2 BTU | 0.586142 Wh |
| 5 BTU | 1.46536 Wh |
| 10 BTU | 2.93071 Wh |
| 25 BTU | 7.32678 Wh |
| 50 BTU | 14.6536 Wh |
| 100 BTU | 29.3071 Wh |
| 250 BTU | 73.2678 Wh |
| 500 BTU | 146.536 Wh |
| 1,000 BTU | 293.071 Wh |
Frequently Asked Questions
How do I convert btu to watt-hours?
Enter the value above and the result appears instantly — the calculation runs entirely in your browser. Formula: value ÷ 3.41214.
What is the exact btu to watt-hours conversion factor?
1 British thermal unit = 0.293071 watt-hours (shown to 6 significant figures — the converter itself computes at full precision). The reverse factor is 1 watt-hour = 3.41214 btu.
What are some common btu to watt-hours conversions?
1 BTU = 0.293071 Wh; 10 BTU = 2.93071 Wh; 100 BTU = 29.3071 Wh. 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".
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