## ››Convert horsepower hour to petajoule

 horsepower hour petajoule

How many horsepower hour in 1 petajoule? The answer is 372506141.22937.
We assume you are converting between horsepower hour and petajoule.
You can view more details on each measurement unit:
horsepower hour or petajoule
The SI derived unit for energy is the joule.
1 joule is equal to 3.7250614122937E-7 horsepower hour, 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 horsepower hours and petajoules.
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## ››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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