This converter allows you to quickly convert cubic inches (in³)
into us gallons (gal).
Simply enter a value, choose your units, and get an instant, accurate result.
Cubic Inch to US Gallon Conversion Table
Cubic Inch (in³)
US Gallon (gal)
1
0.004329
2
0.008658
5
0.021645
10
0.04329
20
0.08658
50
0.21645
100
0.4329
200
0.865801
500
2.164502
1000
4.329004
2000
8.658009
5000
21.645022
10000
43.290043
20000
86.580087
50000
216.450216
100000
432.900433
200000
865.800866
500000
2,164.502165
1000000
4,329.004329
2000000
8,658.008658
How to convert Cubic Inches to US Gallons?
To convert cubic inches to us gallons, multiply by the conversion factor:
Example: Convert 10 Cubic Inches to US Gallons
Frequently asked questions
How many us gallons are in 1 cubic inch?
1 Cubic Inch (in³) equals 0.004329 us gallons (gal).
How many cubic inches are in 1 us gallon?
1 US Gallon (gal) equals 231 cubic inches (in³).
How do I convert us gallons back to cubic inches?
Use the swap button above to flip the converter, or type a value directly into the "US Gallon" field — this page converts in both directions instantly as you type, with no submit button needed.
Which is larger, cubic inch or us gallon?
1 US Gallon is larger — it takes 231 cubic inches to equal 1 us gallon.