Gallon US to Cubic Inch Converter

1 Gallon US = 231 Cubic Inch
Gallon US (US gal) ➜ Cubic Inch (in³)
 
US gal

Gallon US vs Cubic Inch Comparison Chart

Source - Gallon USTarget - Cubic Inch

Gallon US (US gal) - Definition and Overview

What is Gallon US?

A US Gallon is defined as 231 cubic inches or approximately 3.78541 liters. The US gallon is used for measuring liquid volume in United States and some Latin American and Caribbean countries.

Summary

  • The US gallon is a unit of volume that is commonly used in the United States and some Latin American and Caribbean countries to measure the volume of liquids, such as gasoline, milk, and water
  • It is also used in the brewing and distilling industries to measure the volume of beer and spirits
  • The US gallon is a convenient unit of volume because it is easy to convert to other units of volume, such as liters and cubic inches.

Cubic Inch (in³) - Definition and Overview

What is Cubic Inch?

A cubic inch (symbol: in^3) is a unit of volume primarily used in the United States and some other countries. It represents the volume of a cube with edges that are one inch in length.

Summary

  • The cubic inch is a unit of volume that is commonly used in the United States and some other countries to measure the volume of small objects and quantities of liquids
  • It is also used in the automotive and aerospace industries to measure the volume of engine displacement
  • The cubic inch is a convenient unit of volume because it is easy to convert to other units of volume, such as cubic feet and liters.

How to Convert Gallon US to Cubic Inch?

1 Gallon US is equal to 231 Cubic Inch. To convert Gallon US to Cubic Inch, use this simple formula:

Cubic Inch = Gallon US x 231

So, just multiply the number of Gallon US by 231 to get equivalent value in Cubic Inch.

Example 1:

Convert 5 Gallon US to Cubic Inch
5 x 231 = 1155 Cubic Inch

Example 2:

Convert 7.5 Gallon US to Cubic Inch
7.5 x 231 = 1732.5 Cubic Inch

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.