How Many US Gallons in a Cubic Inch?

Quick Answer
1 Cubic Inch = 0.004 US Gallons

1 in³ = 0.004 gal

Formula

gal = in³ × 0.004

Conversion Table

Cubic Inches (in³)US Gallons (gal)
1 in³0.004 gal
2 in³0.009 gal
5 in³0.022 gal
10 in³0.043 gal
20 in³0.087 gal
50 in³0.216 gal
100 in³0.433 gal
500 in³2.165 gal
1,000 in³4.329 gal

Worked Examples

Convert 5 in³ to gal:
5 in³ × 0.004 = 0.022 gal
Convert 10 in³ to gal:
10 in³ × 0.004 = 0.043 gal
Convert 50 in³ to gal:
50 in³ × 0.004 = 0.216 gal

FAQ

How many US Gallons are in 1 Cubic Inch?
There are 0.004 US Gallons in 1 Cubic Inch. Formula: gal = in³ × 0.004.
How to convert Cubic Inches to US Gallons?
To convert Cubic Inches to US Gallons, multiply the number of Cubic Inches by 0.004. For example, 10 in³ = 0.043 gal.
How many US Gallons are in 100 Cubic Inches?
There are 0.433 US Gallons in 100 Cubic Inches. Calculation: 100 × 0.004 = 0.433.