Convert kilocalorie to British thermal unit
1 kcal = 3.965666831 BTU
1 kcal = 3.97 BTU
1 kcal in every energy unit
| joule | 4,180 J |
| kilojoule | 4.18 kJ |
| megajoule | 0.00418 MJ |
| calorie | 1,000 cal |
| kilocalorie | 1 kcal |
| watt-hour | 1.16 Wh |
| kilowatt-hour | 0.00116 kWh |
| British thermal unit | 3.97 BTU |
| foot-pound | 3,090 ft⋅lb |
| electron volt | 2.61e+22 eV |
| kiloelectron volt | 2.61e+19 keV |
| megaelectron volt | 2.61e+16 MeV |
How the conversion works
Multiply by 3.965666831 to go from kilocalorie to British thermal unit, 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? British thermal unit to kilocalorie — 1 BTU = 0.2521644007 kcal.
kilocalorie to British thermal unit — common values
| 1 kcal | 3.9656668 BTU |
| 2 kcal | 7.9313337 BTU |
| 3 kcal | 11.897 BTU |
| 5 kcal | 19.828334 BTU |
| 10 kcal | 39.656668 BTU |
| 15 kcal | 59.485002 BTU |
| 20 kcal | 79.313337 BTU |
| 25 kcal | 99.141671 BTU |
| 50 kcal | 198.28334 BTU |
| 75 kcal | 297.42501 BTU |
| 100 kcal | 396.56668 BTU |
| 250 kcal | 991.41671 BTU |
| 500 kcal | 1,982.8334 BTU |
| 1000 kcal | 3,965.6668 BTU |