US liquid gallons
A US liquid gallon is a volume measurement used in the United States for liquids such as water, gasoline, and milk. One US liquid gallon is about 3.78541 liters. A standard bathtub is about 80 gallons of water and a car gas tank can hold anywhere between 12 and 20 gallons of gas.
US cups
A US cup is a common unit of measurement in the United States for cooking and baking. One US cup is about 0.236588 liters and is often used to measure ingredients in recipes.