📏 BTUs to Kilojoules Converter
Convert btus (BTU) to kilojoules (kJ) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 btu (BTU) = 1.0550559 kilojoules (kJ). Formula: kJ = BTU × 1.0550559.
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BTUs to Kilojoules Converter inputs
Result
BTUs to Kilojoules conversion table
| BTUs (BTU) | Kilojoules (kJ) |
|---|---|
| 0.1 BTU | 0.10550559 kJ |
| 0.5 BTU | 0.52752793 kJ |
| 1 BTU | 1.0550559 kJ |
| 2 BTU | 2.1101117 kJ |
| 3 BTU | 3.1651676 kJ |
| 5 BTU | 5.2752793 kJ |
| 10 BTU | 10.550559 kJ |
| 20 BTU | 21.101117 kJ |
| 25 BTU | 26.376396 kJ |
| 50 BTU | 52.752793 kJ |
| 100 BTU | 105.50559 kJ |
| 1,000 BTU | 1,055.0559 kJ |
Other energy conversions
How to convert btus to kilojoules
Multiply the number of btus by 1.0550559 to get kilojoules: kJ = BTU × 1.0550559.
Example: 5 BTU = 5.2752793 kJ.
The btu (BTU) and the kilojoule (kJ) are both units of energy. Need the opposite direction? Use the kJ 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.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many kilojoules are in a btu?
1 btu = 1.0550559 kilojoules.
How do I convert btus to kilojoules?
Use the formula kJ = BTU × 1.0550559. For example, 5 BTU = 5.2752793 kJ.
How do I convert kilojoules back to btus?
1 kilojoule = 0.94781712 btus. Use the kJ 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.