Gallons to quarts (gal to qt) converter

Understanding gallons and quarts

Gallons and quarts are both units of volume most commonly used in the measurement of liquids. These units have variations that differ depending on the regional standards such as United States customary units and British imperial measurements.

• Gallon (gal): A unit of liquid measurement in the United States and Britain, but each has different values. In the US, we use both liquid and dry gallons, while the UK strictly uses gallons for liquid.
• Quart (qt): This unit is one-fourth of a gallon. Like gallons, there are both US and UK quarts.

For accurate conversions, it is essential to understand these variations:

1. US liquid gallon (US gal): Approximately 3.785 liters.
2. US dry gallon: Approximately 4.405 liters.
3. UK (Imperial) gallon (UK gal): Exactly 4.54609 liters.

And the following types of quarts:

1. US liquid quart (US qt): Approximately 0.946353 liters.
2. US dry quart: Approximately 1.1012209 liters.
3. UK (Imperial) quart (UK qt): Exactly 1.1365225 liters.

The differentiation between liquid and dry measurements is due to various historical reasons, where dry ingredients were often denser and more granular, meaning a separate set of weights and measurements was needed (including dry gallons and quarts in the US). The British Imperial measure sought uniformity in the system, despite slight variations in fluid content.

Therefore, conversions are usually in terms of liquid units, however, in some cases, such as when measuring dry ingredients, it may be necessary to use dry gallons and quarts.

Conversion formula

The process of converting gallons to quarts requires understanding the relationships between these differences. The basic conversion can be expressed as:

Where $n$ stands for the number of quarts in one gallon, depending on the type of gallon and quart you are using, namely:

• 4 US liquid quarts in a US liquid gallon
• 4 US dry quarts in a US dry gallon
• 4 UK quarts in a UK gallon

Conversion table

Below is a detailed chart that tells you how many quarts are in various gallons of different standards.

Examples of conversion

1. Converting gallons to quarts

   Use 3 US liquid gallons to convert to US liquid quarts.

   Calculation:

   $$\text{Quarts} = 3 \times 4 = 12$$

   Thus, 3 US liquid gallons make 12 US liquid quarts.

2. Converting UK gallons to UK quarts

   Use 1.75 UK gallons to convert to UK quarts.

   Calculation:

   $$\text{Quarts} = 1.75 \times 4 = 7$$

   Thus, 1.75 UK gallons is equal to 7 UK quarts.

3. Cross conversion - US gallons to UK quarts

   Use 2.6 US liquid gallons to convert to UK quarts.

   Calculation using the approximate factor 3.607:

   $$\text{Quarts} = 2.6 \times 3.3307 = 8.65982$$

   Hence, 2.6 US liquid gallons is equal to approximately 8.7 UK quarts.

To convert other volume units for convenience, also use our volume converter.

Frequently asked questions

How many quarts are in 5 US gallons?

Using the conversion factor of 4, multiply by the total number of gallons:

5 US liquid gallons corresponds to 20 US liquid quarts.

How many UK quarts are in 2 UK gallons?

Each UK gallon has 4 quarts:

Thus, 2 UK gallons are equal to 8 UK quarts.

What is the difference between dry and liquid gallons?

US liquid gallons measure volume traditionally used for liquids, containing approximately 3.785 liters. In contrast, US dry gallons are larger, about 4.405 liters, designed for dry, bulk goods.

Is there an easy way to remember basic conversions?

An easy guide is: 4 quarts in a gallon for both US and UK systems.