How do I convert kilojoules back to joules?

Use the reverse converter: 1 kilojoule equals 1000 J.

Is this converter accurate?

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert joules to kilojoules, multiply the value by 0.001.

kJ = J × 0.001

40 J × 0.001 = 0.04 kJ

Joule (J): The SI unit of energy, one newton-metre, named after James Prescott Joule.
Kilojoule (kJ): 1,000 joules; used for food energy in Australia, New Zealand and much of Europe.

How do I convert joules to kilojoules?: To convert joules to kilojoules, multiply the value by 0.001.
How many kilojoules are in 1 joule?: 1 joule equals 0.001 kJ.
How many kilojoules are in 10 joules?: 10 J equals 0.01 kJ.
How do I convert kilojoules back to joules?: Use the reverse converter: 1 kilojoule equals 1000 J.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.