How to convert kilojoules to BTU
BTU = kJ × 0.9478171203
Example: 5 kJ × 0.9478171203 = 4.739085602 BTU
Kilojoules to BTU table
| Kilojoules (kJ) | BTU (BTU) |
|---|---|
| 0.5 kJ | 0.47390856 BTU |
| 1 kJ | 0.94781712 BTU |
| 2 kJ | 1.8956342 BTU |
| 3 kJ | 2.8434514 BTU |
| 4 kJ | 3.7912685 BTU |
| 5 kJ | 4.7390856 BTU |
| 6 kJ | 5.6869027 BTU |
| 7 kJ | 6.6347198 BTU |
| 8 kJ | 7.582537 BTU |
| 9 kJ | 8.5303541 BTU |
| 10 kJ | 9.4781712 BTU |
| 15 kJ | 14.217257 BTU |
| 20 kJ | 18.956342 BTU |
| 25 kJ | 23.695428 BTU |
| 30 kJ | 28.434514 BTU |
| 40 kJ | 37.912685 BTU |
| 50 kJ | 47.390856 BTU |
| 75 kJ | 71.086284 BTU |
| 100 kJ | 94.781712 BTU |
| 250 kJ | 236.95428 BTU |
| 500 kJ | 473.90856 BTU |
| 1,000 kJ | 947.81712 BTU |
About these units
Kilojoules (kJ): A kilojoule is 1,000 joules. Food labels in Europe and Australia show energy in kJ.
BTU (BTU): The British thermal unit (International Table) is about 1,055.06 joules, used for heating and air-conditioning.
Frequently asked questions
How many BTU are in 1 kilojoule?
1 kilojoule (kJ) equals 0.9478171203 BTU.
How do I convert kJ to BTU?
Multiply the value in kilojoules by 0.9478171203. For example, 5 kJ × 0.9478171203 = 4.739085602 BTU.
How do I convert BTU back to kilojoules?
Multiply by 1.055055853 (or divide by 0.9478171203). 1 BTU = 1.055055853 kJ.
What is a kilojoule?
A kilojoule is 1,000 joules. Food labels in Europe and Australia show energy in kJ.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every energy unit at once? Use the Energy Converter.