The result of your conversion between gigajoule and horsepower hour appears here
To convert between Gigajoule and Horsepower Hour you have to do the following:
First divide 1.0e+09 / 2684519.5 = 372.50614123
Then multiply the amount of Gigajoule you want to convert to Horsepower Hour, use the chart below to guide you.
Symbol: GJ
No description
Symbol: hph
No description