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

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To convert watt-hours per gallon to watts, it's essential to understand the difference between energy (watt-hours) and power (watts). One gallon of gasoline contains approximately 33.3 kilowatt-hours of energy, which is equivalent to about 120 million BTU. The relationship between miles per gallon (mpg), miles per hour (mph), and gallons per hour can help determine power in watts. By converting gallons into watt-hours, one can derive the power output in watts. Understanding these conversions clarifies the calculation process for determining power from fuel consumption.
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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. ^_^
 
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watt-hours is a unit of energy. Watts are a unit of power - so one watt for one hour would be a watt-hour
 
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.
 
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?
 
mpg and mph gives you gallons/hour = power
If you convert gallons into watt hours then you get power in watts
 

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