How many cubic inches in a gallon?
1 US gallon is equal to 231 cubic inches. To convert gallons to cubic inches, multiply the gallon value by 231.
For example, to convert 5 gallons to cubic inches, multiply 5 by 231, that makes 1155 cu in is 5 gallons.
US gallons to cubic inches formula
cubic inch = gallon * 231
1 US Fluid Gallon = 231 Cubic Inches
What is a Gallon?
Gallon is an imperial and United States Customary measurement systems volume unit. 1 US fluid gallon is equal to 231 cubic inches and 1 Imperial gallon is equal to 277.419 cubic inches. The symbol is "gal".
Please visit all volume units conversion to convert all volume units.