The US gallon (gal) is an imperial volume unit equal to exactly 3.7854 liters, the standard measurement for fuel, milk, and paint in the United States. Gasoline prices at American pumps are always quoted per gallon, and US vehicle fuel efficiency is measured in miles per gallon. One US gallon equals 4 US quarts or 8 US pints.

The teaspoon (tsp) is the smallest standard cooking volume unit, equal to approximately 4.929 milliliters, found in recipes worldwide for measuring small quantities of spices, extracts, and medicine. It serves as the building block for larger measurements, with three teaspoons making one tablespoon. One US teaspoon equals exactly 1/6 of a US fluid ounce.