British thermal units to Kilojoules
Type a value in British thermal units and get the result in Kilojoules, calculated exactly.
100 British thermal units = 105.505585262 Kilojoules
Precision
Exact factorThis result is exact.
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Formula
kJ = BTU × 1.05505585262
To convert British thermal units to Kilojoules, multiply the value by 1.05505585262.
Worked examples
- 1 BTU × 1.05505585262 = 1.05505585262 kJ
- 100 BTU × 1.05505585262 = 105.505585262 kJ
- 50 BTU × 1.05505585262 = 52.752792631 kJ
This factor is exact by definition.
Conversion table
| British thermal units (BTU) | Kilojoules (kJ) |
|---|---|
| 1 | 1.05505585262 |
| 2 | 2.11011170524 |
| 3 | 3.16516755786 |
| 4 | 4.22022341048 |
| 5 | 5.2752792631 |
| 6 | 6.33033511572 |
| 7 | 7.38539096834 |
| 8 | 8.44044682096 |
| 9 | 9.49550267358 |
| 10 | 10.5505585262 |
| 15 | 15.8258377893 |
| 20 | 21.1011170524 |
| 25 | 26.3763963155 |
| 30 | 31.6516755786 |
| 40 | 42.2022341048 |
| 50 | 52.752792631 |
| 60 | 63.3033511572 |
| 70 | 73.8539096834 |
| 75 | 79.1291889465 |
| 80 | 84.4044682096 |
| 90 | 94.9550267358 |
| 100 | 105.505585262 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Kilojoules to British thermal units
| Kilojoules (kJ) | British thermal units (BTU) |
|---|---|
| 1 | ≈ 0.9478171 |
| 2 | ≈ 1.895634 |
| 3 | ≈ 2.843451 |
| 4 | ≈ 3.791268 |
| 5 | ≈ 4.739086 |
| 6 | ≈ 5.686903 |
| 7 | ≈ 6.63472 |
| 8 | ≈ 7.582537 |
| 9 | ≈ 8.530354 |
| 10 | ≈ 9.478171 |
| 15 | ≈ 14.21726 |
| 20 | ≈ 18.95634 |
| 25 | ≈ 23.69543 |
| 30 | ≈ 28.43451 |
| 40 | ≈ 37.91268 |
| 50 | ≈ 47.39086 |
| 60 | ≈ 56.86903 |
| 70 | ≈ 66.3472 |
| 75 | ≈ 71.08628 |
| 80 | ≈ 75.82537 |
| 90 | ≈ 85.30354 |
| 100 | ≈ 94.78171 |
Unit definitions
- British thermal units BTU
- The International Table BTU: exactly 1055.05585262 joules.
- Kilojoules kJ
- Exactly 1000 joules.
Questions people ask
British thermal units to Kilojoules: what is the conversion factor?
One BTU is 1.05505585262 kJ.
How do I convert British thermal units to Kilojoules?
Use the formula above. For example, 100 BTU = 105.505585262 kJ.
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.