Kilowatt-Hours to Gigajoules Conversion (kWh to GJ)

Kilowatt-Hours to Gigajoules Converter

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

Result in Gigajoules:

1 kWh = 0.0036 GJ

How to Convert Kilowatt-Hours to Gigajoules

To convert a measurement in kilowatt-hours to a measurement in gigajoules, multiply the energy by the following conversion ratio: 0.0036 gigajoules/kilowatt-hour.

Since one kilowatt-hour is equal to 0.0036 gigajoules, you can use this simple formula to convert:

gigajoules = kilowatt-hours × 0.0036

The energy in gigajoules is equal to the energy in kilowatt-hours multiplied by 0.0036.

For example, here's how to convert 500 kilowatt-hours to gigajoules using the formula above.

gigajoules = (500 kWh × 0.0036) = 1.8 GJ

Kilowatt-hours and gigajoules 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 Gigajoule?

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

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for billions, or 10⁹. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

Learn more about gigajoules.

Kilowatt-Hour to Gigajoule Conversion Table

Table showing various kilowatt-hour measurements converted to gigajoules.
Kilowatt-hours	Gigajoules
1 kWh	0.0036 GJ
2 kWh	0.0072 GJ
3 kWh	0.0108 GJ
4 kWh	0.0144 GJ
5 kWh	0.018 GJ
6 kWh	0.0216 GJ
7 kWh	0.0252 GJ
8 kWh	0.0288 GJ
9 kWh	0.0324 GJ
10 kWh	0.036 GJ
20 kWh	0.072 GJ
30 kWh	0.108 GJ
40 kWh	0.144 GJ
50 kWh	0.18 GJ
60 kWh	0.216 GJ
70 kWh	0.252 GJ
80 kWh	0.288 GJ
90 kWh	0.324 GJ
100 kWh	0.36 GJ
200 kWh	0.72 GJ
300 kWh	1.08 GJ
400 kWh	1.44 GJ
500 kWh	1.8 GJ
600 kWh	2.16 GJ
700 kWh	2.52 GJ
800 kWh	2.88 GJ
900 kWh	3.24 GJ
1,000 kWh	3.6 GJ

Table showing various kilowatt-hour measurements converted to gigajoules.

Kilowatt-hours

Gigajoules

1 kWh

0.0036 GJ

2 kWh

0.0072 GJ

3 kWh

0.0108 GJ

4 kWh

0.0144 GJ

5 kWh

0.018 GJ

6 kWh

0.0216 GJ

7 kWh

0.0252 GJ

8 kWh

0.0288 GJ

9 kWh

0.0324 GJ

10 kWh

0.036 GJ

20 kWh

0.072 GJ

30 kWh

0.108 GJ

40 kWh

0.144 GJ

50 kWh

0.18 GJ

60 kWh

0.216 GJ

70 kWh

0.252 GJ

80 kWh

0.288 GJ

90 kWh

0.324 GJ

100 kWh

0.36 GJ

200 kWh

0.72 GJ

300 kWh

1.08 GJ

400 kWh

1.44 GJ

500 kWh

1.8 GJ

600 kWh

2.16 GJ

700 kWh

2.52 GJ

800 kWh

2.88 GJ

900 kWh

3.24 GJ

1,000 kWh

3.6 GJ

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