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kilojoule to watt-hour

Live kilojoule (kJ) to watt-hour (Wh) converter. Plus a 10-value reference table and FAQs.

From kJ

kilojoule

To Wh

watt-hour

1 kJ = 0.2778Wh

換算表

kilojouleからwatt-hourまでの 10 個のサンプル値。任意の値には上の換算器をお使いください。

1000 J. Food labels in some countries.

1 W sustained for 1 hour (3600 J).

Both units belong to Energy. Unitbox first expresses the input in the category reference unit (J), then expresses that same quantity in watt-hour.

The right unit depends on the convention used by your industry, country, instrument, or source document.

Reference value1 kJ = 0.27777778 Wh

CalculationBrowser-side, using Unitbox's shared unit data

Review noteFor safety-critical work, verify against the governing standard or instrument manual.

Unit definitions and conversion factors are maintained in the Unitbox methodology. Last reviewed with the current conversion dataset.

How do I convert kilojoule to watt-hour?

Multiply the kilojoule value by 0.277778 to get it in watt-hour. For example, 10 kJ = 2.7778 Wh.

What is 1 kJ in Wh?

1 kJ = 0.277778 Wh.

What is 100 kJ in Wh?

100 kJ = 27.7778 Wh.

What is the formula?

Linear: multiply by 0.277778 (the unit factor ratio).

Use the reverse converter: watt-hour → kilojoule

Energy has 10 units.

Free-form calculator that handles any pair in any category.