How many gram calorie in 1 horsepower hour? The answer is 641339.64833485. We assume you are converting between gram calorie and horsepower hour. You can view more details on each measurement unit: gram calorie or horsepower hour The SI derived unit for energy is the joule. 1 joule is equal to 0.23890295761862 gram calorie, or 3.7250614122937E-7 horsepower hour. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between gram calories and horsepower hours. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from horsepower hour to gram calorie, or enter any two units below:
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