How can I convert watt-hrs per gallon to watts?

[tacojohn]

I'm trying to figure out how to convert watt-hrs per gallon to watts. If anyone can help it would be much appreciated!
Thanks. ^_^

 

[mgb_phys]

watt-hours is a unit of energy. Watts are a unit of power - so one watt for one hour would be a watt-hour

 

[Bob S]

1 gallon of gasoline contains about 120 million btu of energy. 1 kilowatt-hour of energy is equivalent to 3.6 million btu. So 1 gallon of gasoline contains about 33.3 kilowatt-hours of energy.

 

[tacojohn]

Well I'm converting a car's power to watts, knowing the mpg at a specific mph and watts-hr per gallon. So I'm slightly confused because if read that you can not change watt-hr to watts?

Can you shed some light on this for me?

 

[mgb_phys]

mpg and mph gives you gallons/hour = power
If you convert gallons into watt hours then you get power in watts