How many watthour in 1 gigawatt-hour?
The answer is 1000000000.
We assume you are converting between watthour and gigawatt hour.
You can view more details on each measurement unit: watthour or
gigawatt-hour
The SI derived unit for energy is the joule.
1 joule is equal to 0.00027777777777778 watthour, or 2.7777777777778E-13 gigawatt-hour.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between watthour and gigawatt hours.
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