Convert Cubic Inches to Gallons
Convert Cubic Inches (in³) to Gallons (gal) instantly and accurately.
Conversion Formula
gal = in³ × 0.004329004329
About Cubic Inches
A cubic inch (in³) is the volume of a cube with sides of one inch (25.4 mm), equal to approximately 16.387 mL. It is widely used in US engineering and manufacturing - engine displacement was traditionally described in cubic inches (a 350 in³ V8 engine displaces 5.7 liters), and product specifications for items sold in the US frequently reference cubic inches. Speaker cabinet volumes, wine bottle capacities in older US standards, refrigerator compartment sizes, and box shipping calculations in imperial units all use cubic inches. One liter equals approximately 61.024 cubic inches.
About Gallons
A US gallon (gal) = 4 quarts = 128 fl oz ≈ 3.785 L. Gasoline, milk, water, paint, and pesticides are sold by the gallon in the US. About 20% smaller than the UK imperial gallon (4.546 L) - a critical difference when comparing fuel economy across the Atlantic. 1 US gal = 3.785 L = 4 qt = 128 fl oz.
Quick Reference Table
| Cubic Inches (in³) | Gallons (gal) |
|---|---|
| 1 in³ | 0.004329 gal |
| 2 in³ | 0.00865801 gal |
| 5 in³ | 0.021645 gal |
| 10 in³ | 0.04329 gal |
| 25 in³ | 0.108225 gal |
| 50 in³ | 0.21645 gal |
| 100 in³ | 0.4329 gal |