Kilojoules to British Thermal Units Converter
1 kilojoule ≈ 0.94781712 British thermal units
Several BTU definitions exist. This converter uses the International Table BTU, the one used by HVAC equipment ratings.
1 kilojoule equals 0.947817 British thermal units
How to convert kilojoules to British thermal units
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
BTU = kJ × 0.9478171203One kilojoule is 0.9478171203 British thermal units, so a single multiplication converts any value.
9.47817 BTU ≈ 10 × 0.9478171203Several BTU definitions exist. This converter uses the International Table BTU, the one used by HVAC equipment ratings.
Kilojoules to British thermal units conversion table
Common values in kilojoules, converted to British thermal units.
| Kilojoules (kJ) | British thermal units (BTU) |
|---|---|
| 1 | 0.94781712 |
| 2 | 1.8956342 |
| 3 | 2.8434514 |
| 4 | 3.7912685 |
| 5 | 4.7390856 |
| 10 | 9.4781712 |
| 20 | 18.956342 |
| 25 | 23.695428 |
| 50 | 47.390856 |
| 100 | 94.781712 |
| 250 | 236.95428 |
| 500 | 473.90856 |
| 1,000 | 947.81712 |
About these units
kilojoulekJ
One thousand joules. The metric food-energy unit outside the United States.
British thermal unitBTU
The International Table BTU: 1,055.05585262 joules. The US heating and cooling unit.
Reference: NIST Special Publication 811.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.