Convert British thermal unit to joule
1 BTU = 1,055.055853 J
1 BTU = 1,060 J
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 1,055.055853 to go from British thermal unit to joule, 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? joule to British thermal unit — 1 J = 0.0009478171203 BTU.
British thermal unit to joule — common values
| 1 BTU | 1,055.0559 J |
| 2 BTU | 2,110.1117 J |
| 3 BTU | 3,165.1676 J |
| 5 BTU | 5,275.2793 J |
| 10 BTU | 10,550.559 J |
| 15 BTU | 15,825.838 J |
| 20 BTU | 21,101.117 J |
| 25 BTU | 26,376.396 J |
| 50 BTU | 52,752.793 J |
| 75 BTU | 79,129.189 J |
| 100 BTU | 105,505.59 J |
| 250 BTU | 263,763.96 J |
| 500 BTU | 527,527.93 J |
| 1000 BTU | 1,055,055.9 J |