The result of your conversion between zeptojoule and kilojoule appears here
To convert between Zeptojoule and Kilojoule you have to do the following:
First divide 1.0e-21 / 1000 = 0.
Then multiply the amount of Zeptojoule you want to convert to Kilojoule, use the chart below to guide you.
Symbol: zJ
No description
Symbol: kJ
No description