Gallon
Definition 1 of 2
Pro Tip 1/3
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.
Pro Tip 2/3
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.
Pro Tip 3/3
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.