Cubic Feet to Gallons Converter
Enter the volume in cubic feet below to convert it to gallons.
Convert Cubic Feet to Gallons (US)
Enter a value in cubic feet (ft³) to convert to gallons (us) (gal (US)).
Cubic Foot to Gallon Conversion Table
Table showing various cubic foot measurements converted to gallons. Click any preset value or arrow to load it into the converter.
| Cubic Feet (ft³) | Gallons (US) (gal (US)) |
|---|---|
| 1 ft³ | 7.4805195 gal (US) |
| 2 ft³ | 14.961039 gal (US) |
| 5 ft³ | 37.4025974 gal (US) |
| 10 ft³ | 74.8051948 gal (US) |
| 15 ft³ | 112.2077922 gal (US) |
| 20 ft³ | 149.6103896 gal (US) |
| 25 ft³ | 187.012987 gal (US) |
| 30 ft³ | 224.4155844 gal (US) |
| 50 ft³ | 374.025974 gal (US) |
| 75 ft³ | 561.038961 gal (US) |
How to Convert Cubic Feet to Gallons
To convert cubic feet to gallons, multiply the volume by the following conversion ratio: 7.4805195 gallons/cubic foot.
Since one cubic foot is equal to 7.4805195 gallons, you can use this simple formula to convert:
The volume in gallons is equal to the volume in cubic feet multiplied by 7.4805195.
For example, here's how to convert 100 cubic feet to gallons using the formula above.
How Many Gallons Are in a Cubic Foot?
There are 7.4805195 gallons in a cubic foot, which is why we use this value in the formula above.
Our cubic foot to gallon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Cubic Feet and gallons are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Cubic Foot?
A cubic foot is a unit of volume equal to 28.3168466 liters (L), the base unit for volume. Equal to 1,728 cubic inches or 28.3168 liters. [1]
The cubic foot is classified as a US customary and imperial unit of volume. Cubic Feet can be abbreviated as ft³; for example, 1 cubic foot can be written as 1 ft³.
When working with cubic feet (ft³) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, cubic feet (ft³) are widely used across standard volume applications within US customary and imperial 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 cubic feet (ft³) and gallons (gal (US)), keep full floating-point precision (1 ft³ = 7.4805195 gal (US); 1 gal (US) = 0.1336806 ft³) during intermediate calculations and round only the final gallon figure to match your instrument tolerance.
More Cubic Foot & Gallon Conversions
Need to calculate in the opposite direction? Use our gallons (us) to cubic feet converter (gal (US) to ft³) 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 cubic feet to cubic meters.
Convert from Cubic Feet
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Cubic Feet (ft³) to Gallons (US) (gal (US))
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Cubic Foot (ft³) & Gallon (US Liquid) (gal (US))
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (ft³ to gal (US))