Convert British thermal unit to kilojoule
1 BTU = 1.055055853 kJ
1 BTU = 1.06 kJ
1 BTU in every energy unit
| joule | 1,060 J |
| kilojoule | 1.06 kJ |
| megajoule | 0.00106 MJ |
| calorie | 252 cal |
| kilocalorie | 0.252 kcal |
| watt-hour | 0.293 Wh |
| kilowatt-hour | 0.000293 kWh |
| British thermal unit | 1 BTU |
| foot-pound | 778 ft⋅lb |
| electron volt | 6.59e+21 eV |
| kiloelectron volt | 6.59e+18 keV |
| megaelectron volt | 6.59e+15 MeV |
How the conversion works
Multiply by 1.055055853 to go from British thermal unit to kilojoule, or divide by it to go back. Every conversion on this site routes through the SI value (J) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? kilojoule to British thermal unit — 1 kJ = 0.9478171203 BTU.
British thermal unit to kilojoule — common values
| 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 |
| 15 BTU | 15.825838 kJ |
| 20 BTU | 21.101117 kJ |
| 25 BTU | 26.376396 kJ |
| 50 BTU | 52.752793 kJ |
| 75 BTU | 79.129189 kJ |
| 100 BTU | 105.50559 kJ |
| 250 BTU | 263.76396 kJ |
| 500 BTU | 527.52793 kJ |
| 1000 BTU | 1,055.0559 kJ |