Joules to Kilojoules Converter

Convert joules to kilojoules instantly for energy calculations in physics and engineering

Joules (J)

Kilojoules (kJ)

Quick Reference

1,000 J

= 1 kJ

5,000 J

= 5 kJ

10,000 J

= 10 kJ

100,000 J

= 100 kJ

This converter helps you convert between joules and kilojoules. One kilojoule equals 1,000 joules. Both are SI units of energy.

Conversion Formula:
Kilojoules = Joules ÷ 1,000
Joules = Kilojoules × 1,000