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Cubic Feet to U.S. Gallons Converter

Convert cubic feet to U.S. liquid gallons using the exact 1,728/231 dimensional ratio.

Published

US gallons

US liquid gallons
74.8052 gal
Cubic feet entered
10 ft³
Liters
283.17 L
US quarts
299.22 qt

Uses US liquid gallons: 1 ft³ = 1,728/231 gal ≈ 7.480519 gal.

Volume in cubic feet.
ft³

Results update as you type.

Worked example

cubicFeet: 10

Result: 74.8052 gal

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Cubic Feet to U.S. Gallons Converter

One cubic foot contains 12³ = 1,728 cubic inches. One U.S. liquid gallon contains 231 cubic inches. Therefore:

1 ft3=1,728231=7.480519480519… US gal1\text{ ft}^3=\frac{1{,}728}{231}=7.480519480519\ldots\text{ US gal}

Ten cubic feet equal about 74.8051948052 US gal, 283.16846592 L, and 299.220779221 quarts. The conversion uses the ratio rather than a truncated decimal. Negative or invalid numeric inputs and results too large to represent are rejected. Gallons are U.S. liquid gallons, not imperial gallons.

Related: the gallons to cubic feet converter for the reverse direction, the cubic feet calculator for computing ft³ from dimensions, and the gallons to liters calculator for the liter equivalents.

Sources

Compare Cubic Feet to U.S. Gallons Converter with related tools

All comparisons →
Cubic Feet to Gallons vs Gallons to Cubic FeetCompare cubic-feet-to-gallons and gallons-to-cubic-feet converters: the same 1,728/231 ratio in each direction, with different supporting outputs and display precision.

Frequently asked questions

What arithmetic does this calculator use?
The method and defining factors are shown on the page. Arithmetic retains the full factor and rounds only the display.
What inputs are rejected?
Negative or invalid numeric inputs, unknown unit selections, and values whose results are too large are rejected.

Sources

  • NIST-HB44-APPC

    primary · Aug 11, 2026

    Supports: Handbook 44 Appendix C states that one cubic foot equals 1,728 cubic inches and defines the U.S. liquid gallon as 231 cubic inches, the exact ratio behind the converter.

  • NIST-SP811

    primary · Aug 11, 2026

    Supports: NIST SP 811 conversion guidance supports the inch-based dimensional arithmetic and the distinction between U.S. customary and imperial volume units.

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Cubic Feet to U.S. Gallons Converter updated at

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