Gigajoule to Kilowatt-hour Converter

Convert gigajoules to kilowatt-hours with our free online energy converter.

Quick Answer

1 Gigajoule = 277.777778 kilowatt-hours

Formula: Gigajoule × conversion factor = Kilowatt-hour

Use the calculator below for instant, accurate conversions.

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All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: November 2025|Reviewed by: Sam Mathew, Software Engineer

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How to Use the Gigajoule to Kilowatt-hour Calculator:

Enter the value you want to convert in the 'From' field (Gigajoule).
The converted value in Kilowatt-hour will appear automatically in the 'To' field.
Use the dropdown menus to select different units within the Energy category.
Click the swap button (⇌) to reverse the conversion direction.

How to Convert Gigajoule to Kilowatt-hour: Step-by-Step Guide

Converting Gigajoule to Kilowatt-hour involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

kWh = GJ × 277.778

Example Calculation:

1 GJ = 277.777778 kWh

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

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Conversion Table: Gigajoule to Kilowatt-hour

Gigajoule (GJ)	Kilowatt-hour (kWh)
0.5	138.889
1	277.778
1.5	416.667
2	555.556
5	1,388.889
10	2,777.778
25	6,944.444
50	13,888.889
100	27,777.778
250	69,444.444
500	138,888.889
1,000	277,777.778

How do I convert Gigajoule to Kilowatt-hour?

To convert Gigajoule to Kilowatt-hour, enter the value in Gigajoule in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our energy converter page to convert between other units in this category.

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What is the conversion factor from Gigajoule to Kilowatt-hour?

The conversion factor depends on the specific relationship between Gigajoule and Kilowatt-hour. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Kilowatt-hour back to Gigajoule?

Yes! You can easily convert Kilowatt-hour back to Gigajoule by using the swap button (⇌) in the calculator above, or by visiting our Kilowatt-hour to Gigajoule converter page. You can also explore other energy conversions on our category page.

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What are common uses for Gigajoule and Kilowatt-hour?

Gigajoule and Kilowatt-hour are both standard units used in energy measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our energy converter for more conversion options.

For more energy conversion questions, visit our FAQ page or explore our conversion guides.