Convert cubic inches to US gallons
Select how many decimal places the result will be rounded to:
How to convert cubic inches to US gallons
To convert cubic inches to US gallons, divide a cubic inches value by 231.
Formula US gal = in³ ÷ 231
Example: Convert 100 cubic inches to US gallons Calculations: 100 in³ ÷ 231 ≈ 0.433 US gal
Cubic inch (in³)
The cubic inch is an imperial and US customary systems unit of volume, defined as the volume of a cube with edges one inch in length. It is equal to 0.016387064 liters, or approximately 0.00433 US gallons.
US gallon (US gal)
The US gallon is a US customary systems unit of volume, defined as 231 cubic inches or 128 US fluid ounces, and is equal to 3.785411784 liters. It is the standard unit for measuring volume in the United States.
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