Watt-hour to Gigajoule Converter

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

Quick Answer

1 Watt-hour = 0.0000036 gigajoules

Formula: Watt-hour × conversion factor = Gigajoule

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 Watt-hour to Gigajoule Calculator:

Enter the value you want to convert in the 'From' field (Watt-hour).
The converted value in Gigajoule 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 Watt-hour to Gigajoule: Step-by-Step Guide

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

Formula:

GJ = Wh × 0.0000036

Example Calculation:

1 Wh = 0.0000036 GJ

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: Watt-hour to Gigajoule

Watt-hour (Wh)	Gigajoule (GJ)
0.5	0
1	0
1.5	0
2	0
5	0
10	0
25	0
50	0
100	0
250	0.001
500	0.002
1,000	0.004

How do I convert Watt-hour to Gigajoule?

To convert Watt-hour to Gigajoule, enter the value in Watt-hour 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 Watt-hour to Gigajoule?

The conversion factor depends on the specific relationship between Watt-hour and Gigajoule. 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 Gigajoule back to Watt-hour?

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

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What are common uses for Watt-hour and Gigajoule?

Watt-hour and Gigajoule 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.