📏 Joules to BTUs Converter
Convert joules (J) to btus (BTU) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 joule (J) = 0.0009478171 btus (BTU). Formula: BTU = J × 0.0009478171.
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Joules to BTUs Converter inputs
Result
Joules to BTUs conversion table
| Joules (J) | BTUs (BTU) |
|---|---|
| 0.1 J | 0.0000947817 BTU |
| 0.5 J | 0.0004739086 BTU |
| 1 J | 0.0009478171 BTU |
| 2 J | 0.0018956342 BTU |
| 3 J | 0.0028434514 BTU |
| 5 J | 0.0047390856 BTU |
| 10 J | 0.0094781712 BTU |
| 20 J | 0.018956342 BTU |
| 25 J | 0.023695428 BTU |
| 50 J | 0.047390856 BTU |
| 100 J | 0.094781712 BTU |
| 1,000 J | 0.94781712 BTU |
Other energy conversions
How to convert joules to btus
Multiply the number of joules by 0.0009478171 to get btus: BTU = J × 0.0009478171.
Example: 5 J = 0.0047390856 BTU.
The joule (J) and the btu (BTU) are both units of energy. Need the opposite direction? Use the BTU to J converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
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Frequently asked questions
How many btus are in a joule?
1 joule = 0.0009478171 btus.
How do I convert joules to btus?
Use the formula BTU = J × 0.0009478171. For example, 5 J = 0.0047390856 BTU.
How do I convert btus back to joules?
1 btu = 1,055.0559 joules. Use the BTU to J converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.