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Watt-hour [Wh] to Kilojoule [kJ] Converter

Quick Reference

1 Watt-hour (Wh) = 3.6 Kilojoule (kJ)

1 Kilojoule (kJ) = 0.2777777778 Watt-hour (Wh)

How to Convert Watt-hour to Kilojoule

1 Wh = 3.6 kJ
1 kJ = 0.2777777778 Wh

To convert Watt-hour to Kilojoule, multiply the value by 3.6. To convert Kilojoule back to Watt-hour, divide by 3.6.

Example: convert 10 Wh to kJ:
10 Wh = 10 x 3.6 = 36 kJ

↔ Convert Kilojoule to Watt-hour

Watt-hour

Definition: A watt-hour (symbol Wh) is a unit of energy equal to one watt of power sustained for one hour. It is commonly used to measure electrical energy consumption.

History/origin: The watt-hour is derived from the watt, the SI unit of power, and the hour, a unit of time. It was developed alongside the increasing use of electricity in the late 19th and early 20th centuries.

Current use: Watt-hours are commonly used to measure the energy capacity of batteries, the energy consumption of household appliances, and the amount of electricity generated or consumed by power plants and consumers.

Kilojoule

Definition: A kilojoule (symbol: kJ) is equal to 1000 joules. It's a unit of energy.

History/origin: Based on the joule, using the SI prefix 'kilo-' to denote a factor of one thousand.

Current use: Commonly used to express the energy content of food, fuels, and other substances when the joule would be impractically small. Also used in thermodynamics and other areas of physics and engineering.

Watt-hour to Kilojoule Conversion Table

Watt-hour [Wh]	Kilojoule [kJ]
1 Wh	3.6 kJ
2 Wh	7.2 kJ
5 Wh	18 kJ
10 Wh	36 kJ
20 Wh	72 kJ
50 Wh	180 kJ
100 Wh	360 kJ
200 Wh	720 kJ
500 Wh	1800 kJ
1000 Wh	3600 kJ

Common Watt-hour to Kilojoule conversions

1 Wh = 3.6 kJ
2 Wh = 7.2 kJ
3 Wh = 10.8 kJ
4 Wh = 14.4 kJ
5 Wh = 18 kJ
6 Wh = 21.6 kJ
7 Wh = 25.2 kJ
8 Wh = 28.8 kJ
9 Wh = 32.4 kJ
10 Wh = 36 kJ
12 Wh = 43.2 kJ
15 Wh = 54 kJ
20 Wh = 72 kJ
25 Wh = 90 kJ
30 Wh = 108 kJ
40 Wh = 144 kJ
50 Wh = 180 kJ
60 Wh = 216 kJ
75 Wh = 270 kJ
100 Wh = 360 kJ
150 Wh = 540 kJ
200 Wh = 720 kJ
250 Wh = 900 kJ
300 Wh = 1,080 kJ
500 Wh = 1,800 kJ
750 Wh = 2,700 kJ
1,000 Wh = 3,600 kJ

Common pairs of Energy

Watt-hour

Watt-hour to Milliwatt-hour Watt-hour to Kilowatt-hour Watt-hour to Megawatt-hour Watt-hour to Gigawatt-hour Watt-hour to Joule

Milliwatt-hour

Milliwatt-hour to Watt-hour Milliwatt-hour to Kilowatt-hour Milliwatt-hour to Megawatt-hour Milliwatt-hour to Gigawatt-hour Milliwatt-hour to Joule

Kilowatt-hour

Kilowatt-hour to Watt-hour Kilowatt-hour to Milliwatt-hour Kilowatt-hour to Megawatt-hour Kilowatt-hour to Gigawatt-hour Kilowatt-hour to Joule

Megawatt-hour

Megawatt-hour to Watt-hour Megawatt-hour to Milliwatt-hour Megawatt-hour to Kilowatt-hour Megawatt-hour to Gigawatt-hour Megawatt-hour to Joule

Gigawatt-hour

Gigawatt-hour to Watt-hour Gigawatt-hour to Milliwatt-hour Gigawatt-hour to Kilowatt-hour Gigawatt-hour to Megawatt-hour Gigawatt-hour to Joule

Joule

Joule to Watt-hour Joule to Milliwatt-hour Joule to Kilowatt-hour Joule to Megawatt-hour Joule to Gigawatt-hour

Kilojoule

Kilojoule to Watt-hour Kilojoule to Milliwatt-hour Kilojoule to Kilowatt-hour Kilojoule to Megawatt-hour Kilojoule to Gigawatt-hour

Watt-hour [Wh] to Kilojoule [kJ] Converter

What is 1 Wh in kJ?

1 Watt-hour (Wh) equals 3.6 kJ, and 1 kJ equals 0.2777777778 Wh.

How do I convert Watt-hour to Kilojoule?

Multiply by 3.6: 10 Wh × 3.6 = 36 kJ. The converter above does it for any value, with the precision you choose.

What is 100 Wh in kJ?

100 Wh = 360 kJ. Common amounts are listed on this page, each with its own step-by-step page.

Is a Watt-hour bigger than a Kilojoule?

Yes. 1 Wh = 3.6 kJ, so the same quantity becomes a larger number when written in kJ.

Watt-hour to Kilojoule Converter | UtilLab