Cubic inches to Gallons (US – Liquid) converter

To convert cubic inches to gallons (US – Liquid), enter the value in the first field. The result in gallons (US – Liquid) is calculated automatically using the exact conversion factor.

1 in³ ≈ 0.004329004329 US gal
1 US gal = 231 in³

Formula: US gal ≈ in³ × 0.004329004329
in³ = US gal × 231

Definitions: 1 in³ = 16387.064 mm³; 1 US gal = 231 in³

The cubic inch (in³) is the volume of a cube one inch on each side. It is still used in the United States for engine displacement, especially for classic American cars and motorcycles, and in machining and hydraulic pump specifications.

The US liquid gallon is the everyday gallon in the United States, used for fuel, milk, paint and most liquids sold by volume. It derives from the old English wine gallon, which was fixed at 231 cubic inches.

See the conversion table with commonly used values, handy for quick reference or study.