Watt-hour to Kilojoule Converter (Wh to kJ)

How to Convert Watt-hour to Kilojoule

Formula: Kilojoule = Watt-hour × 3.6

Example: 1 Wh = 3.6 kJ

You can also use the interactive converter above. Simply enter any Watt-hour value and the equivalent Kilojoule value will appear instantly. Click the ⇄ button to reverse the conversion.

A little context on Watt-hour and Kilojoule helps this conversion stick, along with some frequently asked questions below.

What is Watt-hour and Kilojoule?

A Watt-hour (Wh) is a small electrical energy unit equal to one-thousandth of a kilowatt-hour.

A Kilojoule (kJ) equals 1,000 joules and is used on nutrition labels in many countries outside the US.

Real World Uses of Watt-hour to Kilojoule Conversion

• Watt-hour: Commonly used for rating phone, laptop and power bank battery capacity.
• Kilojoule: Commonly used for labeling food energy content in countries using the metric system.

Frequently Asked Questions

What is the formula to convert Watt-hour to Kilojoule?

The formula is: Kilojoule = Watt-hour x 3.6. Multiply any Watt-hour value by 3.6 to get the equivalent in Kilojoule.

What is 1 Watt-hour in Kilojoule?

1 Wh = 3.6 kJ.

How many Watt-hour are in 1 Kilojoule?

1 kJ = 0.277777777777778 Wh.

Is Watt-hour bigger or smaller than Kilojoule?

Watt-hour is bigger than Kilojoule. 1 Watt-hour = 3.6 kJ.