Quarts to Gallons Converter

How to convert quarts to gallons

1 quart = 0.25 gallons. To convert quarts to gallons, divide by 4 (or multiply by 0.25). A US liquid quart is a quarter of a gallon, about 946.4 ml. A US liquid gallon is 231 cubic inches, exactly 3.785411784 L.

Worked examples

• 6 quarts = 1.5 gal (6 ÷ 4)
• 12 quarts = 3 gal (12 ÷ 4)
• 50 quarts = 12.5 gal (50 ÷ 4)

Where this conversion comes up

Quarts are used for motor oil, milk, stock and slow-cooker sizes; gallons for gasoline, milk, paint and fish tanks in the US. A US gallon is exactly 4 quarts, so 6 qt of motor oil is 1.5 gal and a 50-quart cooler holds 12.5 gallons.

Quick estimate

Divide by 4.

Common mistakes

• Multiplying instead of dividing. A gallon is larger than a quart, so the number of gallons must come out smaller: 6 quarts = 1.5 gal.
• Using the imperial (UK) unit. This page uses US measures. An imperial gallon is 4.546 L (20% more than a US gallon), an imperial pint 568 ml and an imperial fluid ounce 28.41 ml.

Going the other way? Use the gallons to quarts converter. Related volume converters: ml to oz, oz to ml, liters to gallons, gallons to liters, liters to quarts, quarts to liters.