Cups to Gallons Converter
Enter the volume in cups below to convert it to gallons.
Convert Cups (US) to Gallons (US)
Enter a value in cups (us) (cup) to convert to gallons (us) (gal (US)).
Cup to Gallon Conversion Table
Table showing various cup measurements converted to gallons. Click any preset value or arrow to load it into the converter.
| Cups (US) (cup) | Gallons (US) (gal (US)) |
|---|---|
| 1 cup | 0.0625 gal (US) |
| 2 cup | 0.125 gal (US) |
| 5 cup | 0.3125 gal (US) |
| 8 cup | 0.5 gal (US) |
| 10 cup | 0.625 gal (US) |
| 15 cup | 0.9375 gal (US) |
| 16 cup | 1 gal (US) |
| 20 cup | 1.25 gal (US) |
| 25 cup | 1.5625 gal (US) |
| 30 cup | 1.875 gal (US) |
How to Convert Cups to Gallons
To convert cups to gallons, multiply the volume by the following conversion ratio: 0.0625 gallons/cup.
Since one cup is equal to 0.0625 gallons, you can use this simple formula to convert:
The volume in gallons is equal to the volume in cups multiplied by 0.0625.
For example, here's how to convert 16 cups to gallons using the formula above.
How Many Gallons Are in a Cup?
There are 0.0625 gallons in a cup, which is why we use this value in the formula above.
Our cup to gallon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Cups and gallons are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Cup?
A cup is a unit of volume equal to 0.2365882 liters (L), the base unit for volume. Equal to 8 US fluid ounces or 16 US tablespoons (236.59 mL). [1]
The cup is classified as a US customary unit of volume. Cups can be abbreviated as cup; for example, 1 cup can be written as 1 cup.
When working with cups (cup) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, cups (cup) 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 cups (cup) and gallons (gal (US)), keep full floating-point precision (1 cup = 0.0625 gal (US); 1 gal (US) = 16 cup) during intermediate calculations and round only the final gallon figure to match your instrument tolerance.
More Cup & Gallon Conversions
Need to calculate in the opposite direction? Use our gallons (us) to cups (us) converter (gal (US) to cup) to switch your starting unit immediately. You can also explore related tools such as converting liters to gallons (us), converting quarts (us) to gallons (us), or converting cups (us) to tablespoons (us).
Convert from Cups
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 — Cups (US) (cup) to Gallons (US) (gal (US))
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Cup (US Customary) (cup) & Gallon (US Liquid) (gal (US))
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (cup to gal (US))