Kilojoule to Joule Converter

Type in either field — conversion updates instantly in both directions.

Formula: J = kJ × 1000
Quick conversion table
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How to convert Kilojoule to Joule

Kilojoules and Joules are energy units used in physics, nutrition, and electrical engineering. One kJ equals 1000 J. Use this converter for electricity bills, dietary calorie counts, and scientific calculations.

Formula: J = kJ × 1000
Reverse: kJ = J × 0.001