📏 BTUs to Joules Converter
Convert btus (BTU) to joules (J) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 btu (BTU) = 1,055.0559 joules (J). Formula: J = BTU × 1,055.0559.
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BTUs to Joules Converter inputs
Result
BTUs to Joules conversion table
| BTUs (BTU) | Joules (J) |
|---|---|
| 0.1 BTU | 105.50559 J |
| 0.5 BTU | 527.52793 J |
| 1 BTU | 1,055.0559 J |
| 2 BTU | 2,110.1117 J |
| 3 BTU | 3,165.1676 J |
| 5 BTU | 5,275.2793 J |
| 10 BTU | 10,550.559 J |
| 20 BTU | 21,101.117 J |
| 25 BTU | 26,376.396 J |
| 50 BTU | 52,752.793 J |
| 100 BTU | 105,505.59 J |
| 1,000 BTU | 1,055,055.9 J |
Other energy conversions
How to convert btus to joules
Multiply the number of btus by 1,055.0559 to get joules: J = BTU × 1,055.0559.
Example: 5 BTU = 5,275.2793 J.
The btu (BTU) and the joule (J) are both units of energy. Need the opposite direction? Use the J to BTU 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 joules are in a btu?
1 btu = 1,055.0559 joules.
How do I convert btus to joules?
Use the formula J = BTU × 1,055.0559. For example, 5 BTU = 5,275.2793 J.
How do I convert joules back to btus?
1 joule = 0.0009478171 btus. Use the J to BTU 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.