Gallons to Cubic Inches
Convert gallons (gal) to cubic inches (in³). Type in either box; the other updates as you go.
How to convert gallons to cubic inches
To convert gallons to cubic inches, multiply the number of gallons by 231.
Example
Convert 5 gallons to cubic inches:
Gallon to cubic inch conversion chart
| Gallons (gal) | Cubic Inches (in³) |
|---|---|
| 1 gal | 231 in³ |
| 2 gal | 462 in³ |
| 3 gal | 693 in³ |
| 4 gal | 924 in³ |
| 5 gal | 1,155 in³ |
| 6 gal | 1,386 in³ |
| 7 gal | 1,617 in³ |
| 8 gal | 1,848 in³ |
| 9 gal | 2,079 in³ |
| 10 gal | 2,310 in³ |
| 12 gal | 2,772 in³ |
| 15 gal | 3,465 in³ |
| 20 gal | 4,620 in³ |
| 25 gal | 5,775 in³ |
| 30 gal | 6,930 in³ |
| 40 gal | 9,240 in³ |
| 50 gal | 11,550 in³ |
| 60 gal | 13,860 in³ |
| 70 gal | 16,170 in³ |
| 75 gal | 17,325 in³ |
| 80 gal | 18,480 in³ |
| 90 gal | 20,790 in³ |
| 100 gal | 23,100 in³ |
| 150 gal | 34,650 in³ |
| 200 gal | 46,200 in³ |
| 250 gal | 57,750 in³ |
| 500 gal | 115,500 in³ |
| 1,000 gal | 231,000 in³ |
Going the other way? See the cubic inches to gallons chart.
About the units
Gallon (gal)
A US gallon is 231 cubic inches, about 3.785 liters. It is the unit for fuel and milk in the US. The imperial gallon is about 20% larger.
Cubic Inch (in³)
A cubic inch is the volume of a cube one inch on each side, about 16.39 milliliters. US engine sizes were long given in cubic inches.
Frequently asked questions
How many cubic inches are in a gallon?
There are 231 cubic inches in a gallon.
How many gallons are in a cubic inch?
There are 0.004329004329 gallons in a cubic inch.
How do you convert gallons to cubic inches?
To convert gallons to cubic inches, multiply the number of gallons by 231.
What is 5 gallons in cubic inches?
5 gallons equals 1,155 cubic inches.
Convert between liters, gallons, cups, fluid ounces, tablespoons and cubic units. Open the volume converter to see a value in every unit at once.