Gigajoules to Kilowatt-Hours Converter

Enter the energy in gigajoules below to get the value converted to kilowatt-hours.


Result in Kilowatt-Hours:

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1 GJ = 277.777778 kWh

Do you want to convert kilowatt-hours to gigajoules?

How to Convert Gigajoules to Kilowatt-Hours

To convert a measurement in gigajoules to a measurement in kilowatt-hours, multiply the energy by the following conversion ratio: 277.777778 kilowatt-hours/gigajoule.

Since one gigajoule is equal to 277.777778 kilowatt-hours, you can use this simple formula to convert:

kilowatt-hours = gigajoules × 277.777778

The energy in kilowatt-hours is equal to the energy in gigajoules multiplied by 277.777778.

For example, here's how to convert 5 gigajoules to kilowatt-hours using the formula above.
kilowatt-hours = (5 GJ × 277.777778) = 1,388.888889 kWh

How Many Kilowatt-Hours Are in a Gigajoule?

There are 277.777778 kilowatt-hours in a gigajoule, which is why we use this value in the formula above.

1 GJ = 277.777778 kWh

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

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.

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.

Gigajoule to Kilowatt-Hour Conversion Table

Table showing various gigajoule measurements converted to kilowatt-hours.
Gigajoules Kilowatt-hours
1 GJ 277.78 kWh
2 GJ 555.56 kWh
3 GJ 833.33 kWh
4 GJ 1,111 kWh
5 GJ 1,389 kWh
6 GJ 1,667 kWh
7 GJ 1,944 kWh
8 GJ 2,222 kWh
9 GJ 2,500 kWh
10 GJ 2,778 kWh
11 GJ 3,056 kWh
12 GJ 3,333 kWh
13 GJ 3,611 kWh
14 GJ 3,889 kWh
15 GJ 4,167 kWh
16 GJ 4,444 kWh
17 GJ 4,722 kWh
18 GJ 5,000 kWh
19 GJ 5,278 kWh
20 GJ 5,556 kWh
21 GJ 5,833 kWh
22 GJ 6,111 kWh
23 GJ 6,389 kWh
24 GJ 6,667 kWh
25 GJ 6,944 kWh
26 GJ 7,222 kWh
27 GJ 7,500 kWh
28 GJ 7,778 kWh
29 GJ 8,056 kWh
30 GJ 8,333 kWh
31 GJ 8,611 kWh
32 GJ 8,889 kWh
33 GJ 9,167 kWh
34 GJ 9,444 kWh
35 GJ 9,722 kWh
36 GJ 10,000 kWh
37 GJ 10,278 kWh
38 GJ 10,556 kWh
39 GJ 10,833 kWh
40 GJ 11,111 kWh


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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