Watt-hour to Kilojoule Converter

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

Formula: kJ = Wh × 3.6
Quick conversion table
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How to convert Watt-hour to Kilojoule

Watt-hours and Kilojoules are energy units used in physics, nutrition, and electrical engineering. One Wh equals 3.6 kJ. Use this converter for electricity bills, dietary calorie counts, and scientific calculations.

Formula: kJ = Wh × 3.6
Reverse: Wh = kJ × 0.277778