Gallons to Quarts Converter
Enter the volume in gallons below to convert it to quarts.
Convert Gallons (US) to Quarts (US)
Enter a value in gallons (us) (gal (US)) to convert to quarts (us) (qt).
Gallon to Quart Conversion Table
Table showing various gallon measurements converted to quarts. Click any preset value or arrow to load it into the converter.
How to Convert Gallons to Quarts
To convert gallons to quarts, multiply the volume by the following conversion ratio: 4 quarts/gallon.
Since one gallon is equal to 4 quarts, you can use this simple formula to convert:
The volume in quarts is equal to the volume in gallons multiplied by 4.
For example, here's how to convert 5 gallons to quarts using the formula above.
How Many Quarts Are in a Gallon?
There are 4 quarts in a gallon, which is why we use this value in the formula above.
Our gallon to quart calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Gallons and quarts are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Gallon?
A gallon is a unit of volume equal to 3.7854118 liters (L), the base unit for volume. US liquid gallon defined as exactly 231 cubic inches (3.78541 L). [1]
The gallon is classified as a US customary unit of volume. Gallons can be abbreviated as gal (US); for example, 1 gallon can be written as 1 gal (US).
When working with gallons (gal (US)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gallons (gal (US)) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Quart?
A quart is a unit of volume equal to 0.9463529 liters (L), the base unit for volume. Equal to 1/4 US gallon or 2 US pints (946.35 mL). [2]
The quart is classified as a US customary unit of volume. Quarts can be abbreviated as qt; for example, 1 quart can be written as 1 qt.
When working with quarts (qt) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, quarts (qt) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.
When converting volume between gallons (gal (US)) and quarts (qt), keep full floating-point precision (1 gal (US) = 4 qt; 1 qt = 0.25 gal (US)) during intermediate calculations and round only the final quart figure to match your instrument tolerance.
More Gallon & Quart Conversions
Need to calculate in the opposite direction? Use our quarts (us) to gallons (us) converter (qt to gal (US)) to switch your starting unit immediately. You can also explore related tools such as converting pints (us) to quarts (us), converting cups (us) to quarts (us), or converting gallons (us) to liters.
Convert from Gallons
Weight and volume require ingredient density (g/mL). Choose a USDA FoodData Central verified ingredient below:
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Gallons (US) (gal (US)) to Quarts (US) (qt)
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Gallon (US Liquid) (gal (US)) & Quart (US Liquid) (qt)
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (gal (US) to qt)