Convert calorie to joule
1 cal = 4.184 J
1 cal = 4.184 J
1 cal in every energy unit
| electron volt | 2.6114e+19 eV |
| hartree | 9.5969e+17 Eh |
| kiloelectron volt | 2.6114e+16 keV |
| megaelectron volt | 26,114,000,000,000 MeV |
| gigaelectron volt | 26,114,000,000 GeV |
| nanojoule | 4,184,000,000 nJ |
| erg | 41,840,000 erg |
| teraelectron volt | 26,114,000 TeV |
| microjoule | 4,184,000 µJ |
| millijoule | 4,184 mJ |
| inch-pound | 37.032 in·lb |
| joule | 4.184 J |
| foot-pound | 3.086 ft⋅lb |
| calorie | 1 cal |
| calorie (International Table) | 0.99933 cal IT |
| kilojoule | 0.004184 kJ |
| BTU (thermochemical) | 0.0039683 BTU th |
| British thermal unit | 0.0039657 BTU |
| watt-hour | 0.0011622 Wh |
| kilocalorie | 0.001 kcal |
| megajoule | 0.000004184 MJ |
| horsepower-hour | 0.0000015586 hp·h |
| kilowatt-hour | 0.0000011622 kWh |
| therm | 3.9657e-08 therm |
| gigajoule | 4.1840e-09 GJ |
| million BTU | 3.9657e-09 MMBTU |
| megawatt-hour | 1.1622e-09 MWh |
| ton of TNT | 1.0000e-09 t TNT |
| tonne of oil equivalent | 9.9933e-11 toe |
| terajoule | 4.1840e-12 TJ |
| gigawatt-hour | 1.1622e-12 GWh |
| kiloton of TNT | 1.0000e-12 kt TNT |
| petajoule | 4.1840e-15 PJ |
| terawatt-hour | 1.1622e-15 TWh |
| megaton of TNT | 1.0000e-15 Mt TNT |
| quad | 3.9657e-18 quad |
How the conversion works
Multiply by 4.184 to go from calorie 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 calorie — 1 J = 0.2390057361 cal.
calorie to joule — common values
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 3 cal | 12.552 J |
| 5 cal | 20.92 J |
| 10 cal | 41.84 J |
| 15 cal | 62.76 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 75 cal | 313.8 J |
| 100 cal | 418.4 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1000 cal | 4,184 J |