How Many Quarts in a Gallon?

This page explains how many quarts are in a gallon, including the important difference between US gallons and UK (Imperial) gallons. These units are commonly used in cooking, liquids, fuel and everyday measurements.

Quick Answer

• 1 US gallon = 4 US quarts
• 1 UK (Imperial) gallon = 4 UK quarts

While both systems use 4 quarts per gallon, the actual volume of a quart differs between US and UK measurement systems.

US Gallon to Quarts

The US liquid gallon is the most commonly used gallon in the United States.

• 1 US gallon = 4 US quarts
• 1/2 US gallon = 2 US quarts
• 1/4 US gallon = 1 US quart

UK (Imperial) Gallon to Quarts

The UK (Imperial) gallon is larger than the US gallon and is used in the United Kingdom and some Commonwealth references.

• 1 UK gallon = 4 UK quarts
• 1/2 UK gallon = 2 UK quarts
• 1/4 UK gallon = 1 UK quart

US vs UK Quart Comparison

Measurement	US Quart	UK Quart
Quarts	1	1
Millilitres (mL)	946 mL (approx.)	1,136 mL (approx.)
Litres (L)	0.946 L	1.136 L

Why the Difference Matters

Although both systems use four quarts per gallon, the US quart is smaller than the UK (Imperial) quart. This difference can affect cooking, mixing liquids, or following instructions from international sources.

Common Uses

• Cooking & recipes: soups, sauces and large-batch liquids
• Beverages: milk, juice and water containers
• Automotive & household: oil, coolant and cleaning liquids

Related Conversions

• How many ounces in a gallon
• How many cups in a gallon
• How many quarts in a litre
• Gallons to litres conversion

⚠️ Important Disclaimer

• This page is provided for general informational purposes only.
• All conversions are based on standard US customary and UK (Imperial) measurement definitions.
• No guarantees or warranties are provided regarding accuracy for specialised, industrial or technical use.
• Users are responsible for confirming measurements required for their specific application.