Convert joule to kilocalorie
1 J = 0.0002390057361 kcal
1 J = 0.00023901 kcal
1 J in every energy unit
| electron volt | 6.2415e+18 eV |
| hartree | 2.2937e+17 Eh |
| kiloelectron volt | 6.2415e+15 keV |
| megaelectron volt | 6,241,500,000,000 MeV |
| gigaelectron volt | 6,241,500,000 GeV |
| nanojoule | 1,000,000,000 nJ |
| erg | 10,000,000 erg |
| teraelectron volt | 6,241,500 TeV |
| microjoule | 1,000,000 µJ |
| millijoule | 1,000 mJ |
| inch-pound | 8.8507 in·lb |
| joule | 1 J |
| foot-pound | 0.73756 ft⋅lb |
| calorie | 0.23901 cal |
| calorie (International Table) | 0.23885 cal IT |
| kilojoule | 0.001 kJ |
| BTU (thermochemical) | 0.00094845 BTU th |
| British thermal unit | 0.00094782 BTU |
| watt-hour | 0.00027778 Wh |
| kilocalorie | 0.00023901 kcal |
| megajoule | 0.000001 MJ |
| horsepower-hour | 3.7251e-07 hp·h |
| kilowatt-hour | 2.7778e-07 kWh |
| therm | 9.4782e-09 therm |
| gigajoule | 1.0000e-09 GJ |
| million BTU | 9.4782e-10 MMBTU |
| megawatt-hour | 2.7778e-10 MWh |
| ton of TNT | 2.3901e-10 t TNT |
| tonne of oil equivalent | 2.3885e-11 toe |
| terajoule | 1.0000e-12 TJ |
| gigawatt-hour | 2.7778e-13 GWh |
| kiloton of TNT | 2.3901e-13 kt TNT |
| petajoule | 1.0000e-15 PJ |
| terawatt-hour | 2.7778e-16 TWh |
| megaton of TNT | 2.3901e-16 Mt TNT |
| quad | 9.4782e-19 quad |
How the conversion works
Multiply by 0.0002390057361 to go from joule 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 joule — 1 kcal = 4,184 J.
joule to kilocalorie — common values
| 1 J | 0.00023900574 kcal |
| 2 J | 0.00047801147 kcal |
| 3 J | 0.00071701721 kcal |
| 5 J | 0.0011950287 kcal |
| 10 J | 0.0023900574 kcal |
| 15 J | 0.003585086 kcal |
| 20 J | 0.0047801147 kcal |
| 25 J | 0.0059751434 kcal |
| 50 J | 0.011950287 kcal |
| 75 J | 0.01792543 kcal |
| 100 J | 0.023900574 kcal |
| 250 J | 0.059751434 kcal |
| 500 J | 0.11950287 kcal |
| 1000 J | 0.23900574 kcal |