
Gallon
US Customary
Remember, in the US, a gallon is smaller than in the UK, common in everyday use.

Please buy a gallon of ice cream for the party.
Fuel Efficiency
Miles per gallon (mpg) measures how far a car can travel on a gallon of fuel, crucial in the US.

Her new car gets 30 miles per gallon, which is quite efficient.
Volume vs. Weight
A gallon measures volume, not weight; different liquids can weigh differently.

This gallon of milk is heavier than a gallon of water.
Compare with
Litre
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