## ››Convert gigajoule to petajoule

 gigajoule petajoule

How many gigajoule in 1 petajoule? The answer is 1000000.
We assume you are converting between gigajoule and petajoule.
You can view more details on each measurement unit:
gigajoule or petajoule
The SI derived unit for energy is the joule.
1 joule is equal to 1.0E-9 gigajoule, or 1.0E-15 petajoule.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between gigajoules and petajoules.
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## ››Definition: Gigajoule

The SI prefix "giga" represents a factor of 109, or in exponential notation, 1E9.

So 1 gigajoule = 109 joules.

The definition of a joule is as follows:

The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honor of the physicist James Prescott Joule (1818-1889).

## ››Definition: Petajoule

The SI prefix "peta" represents a factor of 1015, or in exponential notation, 1E15.

So 1 petajoule = 1015 joules.

The definition of a joule is as follows:

The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honor of the physicist James Prescott Joule (1818-1889).

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