Convert joule to kilojoule

1 J = 0.001 kJ

1 J = 0.001 kJ
1 J in every energy unit
joule1 J
kilojoule0.001 kJ
megajoule0.000001 MJ
calorie0.239 cal
kilocalorie0.000239 kcal
watt-hour0.000278 Wh
kilowatt-hour2.78e-07 kWh
British thermal unit0.000948 BTU
foot-pound0.738 ft⋅lb
electron volt6.24e+18 eV
kiloelectron volt6.24e+15 keV
megaelectron volt6,240,000,000,000 MeV
How the conversion works

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

joule to kilojoule — common values
1 J0.001 kJ
2 J0.002 kJ
3 J0.003 kJ
5 J0.005 kJ
10 J0.01 kJ
15 J0.015 kJ
20 J0.02 kJ
25 J0.025 kJ
50 J0.05 kJ
75 J0.075 kJ
100 J0.1 kJ
250 J0.25 kJ
500 J0.5 kJ
1000 J1 kJ