Convert British thermal unit to kilocalorie
1 BTU = 0.2521644007 kcal
1 BTU = 0.252 kcal
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 0.2521644007 to go from British thermal unit to kilocalorie, 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? kilocalorie to British thermal unit — 1 kcal = 3.965666831 BTU.
British thermal unit to kilocalorie — common values
| 1 BTU | 0.2521644 kcal |
| 2 BTU | 0.5043288 kcal |
| 3 BTU | 0.7564932 kcal |
| 5 BTU | 1.260822 kcal |
| 10 BTU | 2.521644 kcal |
| 15 BTU | 3.782466 kcal |
| 20 BTU | 5.043288 kcal |
| 25 BTU | 6.30411 kcal |
| 50 BTU | 12.60822 kcal |
| 75 BTU | 18.91233 kcal |
| 100 BTU | 25.21644 kcal |
| 250 BTU | 63.0411 kcal |
| 500 BTU | 126.0822 kcal |
| 1000 BTU | 252.1644 kcal |