Convert kilojoule to joule

1 kJ = 1,000 J

1 kJ = 1,000 J
1 kJ in every energy unit
joule1,000 J
kilojoule1 kJ
megajoule0.001 MJ
calorie239 cal
kilocalorie0.239 kcal
watt-hour0.278 Wh
kilowatt-hour0.000278 kWh
British thermal unit0.948 BTU
foot-pound738 ft⋅lb
electron volt6.24e+21 eV
kiloelectron volt6.24e+18 keV
megaelectron volt6.24e+15 MeV
How the conversion works

Multiply by 1,000 to go from kilojoule 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 kilojoule — 1 J = 0.001 kJ.

kilojoule to joule — common values
1 kJ1,000 J
2 kJ2,000 J
3 kJ3,000 J
5 kJ5,000 J
10 kJ10,000 J
15 kJ15,000 J
20 kJ20,000 J
25 kJ25,000 J
50 kJ50,000 J
75 kJ75,000 J
100 kJ100,000 J
250 kJ250,000 J
500 kJ500,000 J
1000 kJ1,000,000 J