How many horsepower hour in 1 million gallon? The answer is 49081409.168382. We assume you are converting between horsepower hour and million gallon [U.S.] of automotive gasoline. You can view more details on each measurement unit: horsepower hour or million gallon The SI derived unit for energy is the joule. 1 joule is equal to 3.7250614122937E-7 horsepower hour, or 7.5895567698846E-15 million gallon. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between horsepower hours and million gallons [U.S.] of automotive gasoline. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from million gallon to horsepower hour, or enter any two units below:
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