Quarts to Gallons Converter
Enter the volume in quarts below to convert it to gallons.
Convert Quarts (US) to Gallons (US)
Enter a value in quarts (us) (qt) to convert to gallons (us) (gal (US)).
Quart to Gallon Conversion Table
Table showing various quart measurements converted to gallons. Click any preset value or arrow to load it into the converter.
| Quarts (US) (qt) | Gallons (US) (gal (US)) |
|---|---|
| 1 qt | 0.25 gal (US) |
| 2 qt | 0.5 gal (US) |
| 5 qt | 1.25 gal (US) |
| 6 qt | 1.5 gal (US) |
| 10 qt | 2.5 gal (US) |
| 12 qt | 3 gal (US) |
| 15 qt | 3.75 gal (US) |
| 20 qt | 5 gal (US) |
| 24 qt | 6 gal (US) |
| 25 qt | 6.25 gal (US) |
How to Convert Quarts to Gallons
To convert quarts to gallons, multiply the volume by the following conversion ratio: 0.25 gallons/quart.
Since one quart is equal to 0.25 gallons, you can use this simple formula to convert:
The volume in gallons is equal to the volume in quarts multiplied by 0.25.
For example, here's how to convert 12 quarts to gallons using the formula above.
How Many Gallons Are in a Quart?
There are 0.25 gallons in a quart, which is why we use this value in the formula above.
Our quart to gallon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Quarts and gallons are both units used to measure volume. Keep reading to learn more about each unit.
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). [1]
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.
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). [2]
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.
When converting volume between quarts (qt) and gallons (gal (US)), keep full floating-point precision (1 qt = 0.25 gal (US); 1 gal (US) = 4 qt) during intermediate calculations and round only the final gallon figure to match your instrument tolerance.
More Quart & Gallon Conversions
Need to calculate in the opposite direction? Use our gallons (us) to quarts (us) converter (gal (US) to qt) to switch your starting unit immediately. You can also explore related tools such as converting liters to gallons (us), converting cubic feet to gallons (us), or converting quarts (us) to pints (us).
Convert from Quarts
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Quarts (US) (qt) to Gallons (US) (gal (US))
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Quart (US Liquid) (qt) & Gallon (US Liquid) (gal (US))
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (qt to gal (US))