Convert Wh to kilojoules

Watt hours to kilojoules. Enter a value to convert, or use the Wh to kilojoules chart further down the page.

1 Wh = 3.6 kJ

1 watt hour equals 3.6 kilojoules. Going the other way, 1 kilojoule = 0.2777777778 watt hours.

How to convert Wh to kilojoules

To convert watt hours to kilojoules, multiply the watt hour value by 3.6. You can also divide by 0.2777777778 to get the same answer.

kJ = Wh × 3.6

Convert 15 Wh to kilojoules:

15 Wh = 54 kJ

Use this Wh to kilojoules table for quick reference without typing anything.

A watt hour is exactly 3,600 joules — the energy used by a one-watt device in one hour. Battery capacity is rated in watt hours.

The kilojoule is 1,000 joules and is the food-energy unit on nutrition labels outside the United States.

How many kilojoules are in a watt hour?

1 Wh equals 3.6 kilojoules. Going the other way, 1 kilojoules is 0.2777777778 Wh.

How do you convert Wh to kilojoules?

To convert watt hours to kilojoules, multiply the watt hour value by 3.6. You can also divide by 0.2777777778 to get the same answer.

What is 10 Wh in kilojoules?

10 Wh equals 36 kilojoules. The conversion chart on this page lists the other values people look up most often.