Kilowatt-Hours to Kilojoules Conversion (kWh to kJ)

Kilowatt-Hours to Kilojoules Converter

Enter the energy in kilowatt-hours below to convert it to kilojoules.

Result in Kilojoules:

1 kWh = 3,600 kJ

How to Convert Kilowatt-Hours to Kilojoules

To convert a measurement in kilowatt-hours to a measurement in kilojoules, multiply the energy by the following conversion ratio: 3,600 kilojoules/kilowatt-hour.

Since one kilowatt-hour is equal to 3,600 kilojoules, you can use this simple formula to convert:

kilojoules = kilowatt-hours × 3,600

The energy in kilojoules is equal to the energy in kilowatt-hours multiplied by 3,600.

For example, here's how to convert 5 kilowatt-hours to kilojoules using the formula above.

kilojoules = (5 kWh × 3,600) = 18,000 kJ

How Many Kilojoules Are in a Kilowatt-Hour?

There are 3,600 kilojoules in a kilowatt-hour, which is why we use this value in the formula above.

1 kWh = 3,600 kJ

Kilowatt-hours and kilojoules are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Kilowatt-Hour?

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.^[1]

Learn more about kilowatt-hours.

What Is a Kilojoule?

One kilojoule is equal to 1,000 joules, which is the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for thousands, or 10³. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.

Learn more about kilojoules.

Kilowatt-Hour to Kilojoule Conversion Table

Table showing various kilowatt-hour measurements converted to kilojoules.
Kilowatt-hours	Kilojoules
0.001 kWh	3.6 kJ
0.002 kWh	7.2 kJ
0.003 kWh	10.8 kJ
0.004 kWh	14.4 kJ
0.005 kWh	18 kJ
0.006 kWh	21.6 kJ
0.007 kWh	25.2 kJ
0.008 kWh	28.8 kJ
0.009 kWh	32.4 kJ
0.01 kWh	36 kJ
0.02 kWh	72 kJ
0.03 kWh	108 kJ
0.04 kWh	144 kJ
0.05 kWh	180 kJ
0.06 kWh	216 kJ
0.07 kWh	252 kJ
0.08 kWh	288 kJ
0.09 kWh	324 kJ
0.1 kWh	360 kJ
0.2 kWh	720 kJ
0.3 kWh	1,080 kJ
0.4 kWh	1,440 kJ
0.5 kWh	1,800 kJ
0.6 kWh	2,160 kJ
0.7 kWh	2,520 kJ
0.8 kWh	2,880 kJ
0.9 kWh	3,240 kJ
1 kWh	3,600 kJ

Table showing various kilowatt-hour measurements converted to kilojoules.

Kilowatt-hours

Kilojoules

0.001 kWh

3.6 kJ

0.002 kWh

7.2 kJ

0.003 kWh

10.8 kJ

0.004 kWh

14.4 kJ

0.005 kWh

18 kJ

0.006 kWh

21.6 kJ

0.007 kWh

25.2 kJ

0.008 kWh

28.8 kJ

0.009 kWh

32.4 kJ

0.01 kWh

36 kJ

0.02 kWh

72 kJ

0.03 kWh

108 kJ

0.04 kWh

144 kJ

0.05 kWh

180 kJ

0.06 kWh

216 kJ

0.07 kWh

252 kJ

0.08 kWh

288 kJ

0.09 kWh

324 kJ

0.1 kWh

360 kJ

0.2 kWh

720 kJ

0.3 kWh

1,080 kJ

0.4 kWh

1,440 kJ

0.5 kWh

1,800 kJ

0.6 kWh

2,160 kJ

0.7 kWh

2,520 kJ

0.8 kWh

2,880 kJ

0.9 kWh

3,240 kJ

1 kWh

3,600 kJ

References

Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf