Convert calorie to megajoule
1 cal = 0.000004184 MJ
1 cal = 0.000004184 MJ
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 0.000004184 to go from calorie to megajoule, 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? megajoule to calorie — 1 MJ = 239,005.7361 cal.
calorie to megajoule — common values
| 1 cal | 0.000004184 MJ |
| 2 cal | 0.000008368 MJ |
| 3 cal | 0.000012552 MJ |
| 5 cal | 0.00002092 MJ |
| 10 cal | 0.00004184 MJ |
| 15 cal | 0.00006276 MJ |
| 20 cal | 0.00008368 MJ |
| 25 cal | 0.0001046 MJ |
| 50 cal | 0.0002092 MJ |
| 75 cal | 0.0003138 MJ |
| 100 cal | 0.0004184 MJ |
| 250 cal | 0.001046 MJ |
| 500 cal | 0.002092 MJ |
| 1000 cal | 0.004184 MJ |