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US Gallons to Cubic Inches Converter

Convert US gallons (gal) to cubic inches (in³)

Convert Volume

gal

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Result

231 in³
Cubic Inches

1 gal = 231 in³

1 gal in other units

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How to convert US gallons to cubic inches

One US gallon equals 231 cubic inches, so multiply the number of US gallons by 231.

in³ = gal × 231

1 gal = 231 in³ · 1 in³ = 0.004329004 gal

Worked example

To convert 5 US gallons to cubic inches: 5 gal × 231 = 1,155 in³.

About US gallons (gal)

A US gallon is 128 US fluid ounces, about 3.785 litres. US fuel and milk are sold by the gallon.

About cubic inches (in³)

A cubic inch is about 16.39 mL, used for small containers and US engine displacement.

More conversions

Cubic Inches to US GallonsAll units: Volume Converter

US Gallons to other units

Other units to Cubic Inches

Frequently asked questions

How many cubic inches are in one US gallon?

One US gallon equals 231 cubic inches.

How many US gallons are in one cubic inch?

One cubic inch equals 0.004329004 US gallons.

How do I convert US gallons to cubic inches?

Use the formula in³ = gal × 231. For example, 5 gal × 231 = 1,155 in³.