Convert calorie to kilojoule

1 cal = 0.004184 kJ

1 cal = 0.00418 kJ
1 cal in every energy unit
joule4.18 J
kilojoule0.00418 kJ
megajoule0.00000418 MJ
calorie1 cal
kilocalorie0.001 kcal
watt-hour0.00116 Wh
kilowatt-hour0.00000116 kWh
British thermal unit0.00397 BTU
foot-pound3.09 ft⋅lb
electron volt2.61e+19 eV
kiloelectron volt2.61e+16 keV
megaelectron volt26,100,000,000,000 MeV
How the conversion works

Multiply by 0.004184 to go from calorie to kilojoule, 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? kilojoule to calorie — 1 kJ = 239.0057361 cal.

calorie to kilojoule — common values
1 cal0.004184 kJ
2 cal0.008368 kJ
3 cal0.012552 kJ
5 cal0.02092 kJ
10 cal0.04184 kJ
15 cal0.06276 kJ
20 cal0.08368 kJ
25 cal0.1046 kJ
50 cal0.2092 kJ
75 cal0.3138 kJ
100 cal0.4184 kJ
250 cal1.046 kJ
500 cal2.092 kJ
1000 cal4.184 kJ