Convert calorie to joule
1 cal = 4.184 J
1 cal = 4.18 J
1 cal in every energy unit
| joule | 4.18 J |
| kilojoule | 0.00418 kJ |
| megajoule | 0.00000418 MJ |
| calorie | 1 cal |
| kilocalorie | 0.001 kcal |
| watt-hour | 0.00116 Wh |
| kilowatt-hour | 0.00000116 kWh |
| British thermal unit | 0.00397 BTU |
| foot-pound | 3.09 ft⋅lb |
| electron volt | 2.61e+19 eV |
| kiloelectron volt | 2.61e+16 keV |
| megaelectron volt | 26,100,000,000,000 MeV |
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 |