Btus to Kilojoules Converter
Convert British thermal unit to kilojoule instantly. Type a value below — the result updates as you type.
When you need to convert British thermal unit to kilojoule
Energy conversions appear on nutrition labels, utility bills and appliance specs, letting you compare food energy, electricity use and heating output on a common scale.
Typical values: 0.5 BTU is about 0.5275 kJ, and 100 BTU works out to roughly 105.5056 kJ. Because the ratio is fixed at 1.0551, you can scale any amount linearly — doubling the BTUs doubles the kilojoules.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert British thermal unit to kilojoule
One British thermal unit equals 1.0551 kilojoules. To convert, multiply the number of BTUs by 1.0551:
kilojoules = BTUs × 1.0551
For example, 10 BTUs × 1.0551 = 10.5506 kilojoules.
Btus to kilojoules conversion table
| Energy (BTU) | Kilojoules (kJ) |
|---|---|
| 1 BTU | 1.0551 kJ |
| 2 BTU | 2.1101 kJ |
| 3 BTU | 3.1652 kJ |
| 5 BTU | 5.2753 kJ |
| 10 BTU | 10.5506 kJ |
| 20 BTU | 21.1011 kJ |
| 50 BTU | 52.7528 kJ |
| 100 BTU | 105.5056 kJ |
FAQ
How many kilojoules are in a British thermal unit?
One British thermal unit = 1.0551 kilojoules.
How do I convert kilojoules back to BTUs?
Divide by 1.0551, or use the kilojoules to BTUs converter.