Cubic inches (in³) to US gallons (gal) Conversion

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Cubic inches

The cubic inch is a unit of volume in the US customary and imperial systems equal to exactly 16.387 mL (the cube of 2.54 cm). Engine displacement in the United States is traditionally expressed in cubic inches: a 350 cubic inch V8 engine. It is also used in packaging, woodworking, and small industrial parts specifications.

US gallons

The US liquid gallon is a unit of volume equal to exactly 3.785411784 litres, used primarily in the United States for fuel sales, beverage containers, and agricultural applications. It is divided into 4 quarts, 8 pints, or 128 fluid ounces. The US gallon is approximately 16.7% smaller than the imperial (UK) gallon — a difference with significant implications in fuel economy comparisons and recipe conversions.

Cubic inches (in³) to US gallons (gal) - Conversion Table
Cubic inches (in³) US gallons (gal)
0.1 in³0.000433 gal
1 in³0.00433 gal
2 in³0.00866 gal
3 in³0.013 gal
5 in³0.0216 gal
10 in³0.0433 gal
20 in³0.0866 gal
30 in³0.1299 gal
50 in³0.2165 gal
100 in³0.4329 gal
1000 in³4.329 gal

Frequently Asked Questions (FAQ)

How many US gallons are in 1 cubic inches?

1 cubic inches (in³) is exactly 0.004329 US gallons (gal).

How do I convert cubic inches to US gallons?

Multiply the value in cubic inches by 0.004329 to get the result in US gallons. Or use the converter above — type any number and see the result instantly.

Convert Cubic inches (in³) to other units of Volume