A cubic inch is a unit of volume used in the imperial and U.S. customary systems. It represents the space occupied by a cube, with each side measuring exactly one inch. One cubic inch is equal to 16.387 milliliters or approximately 0.0005787 cubic feet, and it's abbreviated as in³.
The cubic inch is often used to measure smaller volumes in areas like automotive design, mechanical components, and product manufacturing. It’s a go-to unit for things like engine size, compact storage, and custom parts where detailed, space-specific measurements are needed.
Uses: The cubic inch is most widely recognized in the automotive world, where it's often used to express engine size—especially in classic American vehicles. It's also used in engineering and manufacturing for parts design, packaging, and product specifications where precision is important.
In everyday use, you might see cubic inches listed when measuring the internal dimensions of a drawer, estimating the volume of a small box, or comparing product capacities. It remains a trusted unit for capturing volume in tight spaces where accuracy matters.
The gallon (US) is a large unit of volume used in the U.S. customary measurement system. One US gallon is equal to 128 US fluid ounces, or approximately 3.785 liters. It's commonly abbreviated as gal and is often used for measuring larger quantities of liquids in household and commercial settings.
As one of the largest common units for liquid measurement in the United States, the gallon is widely recognized for storing and transporting liquids like milk, water, and gasoline. Its size makes it practical for bulk quantities and remains a standard unit in industries ranging from agriculture to retail packaging.
Uses: In everyday life, the US gallon is most commonly seen on milk jugs, bottled water, and fuel pumps. Whether you're filling up a gas tank or picking up a gallon of juice at the grocery store, this unit is a familiar part of American routines.
Beyond the home, the gallon is used across industries that handle large volumes—such as food service, chemical production, and farming. It's also a staple in recipes or instructions for making batches of beverages, soups, or cleaning solutions. Thanks to its capacity and widespread use, the gallon remains one of the most practical and recognizable units for measuring liquids in bulk.
1 in³ = 0.004329 gal
Let’s say you want to convert 100 in³ to gal.
Using the formula:
100 × 0.004329 = 0.433 gal
So, 100 in³ is approximately 0.433 gal.
| Cubic inch (in³) | Gallon (US) (gal) |
|---|---|
| 1 in³ | 0.004 gal |
| 2 in³ | 0.009 gal |
| 3 in³ | 0.013 gal |
| 4 in³ | 0.017 gal |
| 5 in³ | 0.022 gal |
| 6 in³ | 0.026 gal |
| 7 in³ | 0.03 gal |
| 8 in³ | 0.035 gal |
| 9 in³ | 0.039 gal |
| 10 in³ | 0.043 gal |
| 11 in³ | 0.048 gal |
| 12 in³ | 0.052 gal |
| 13 in³ | 0.056 gal |
| 14 in³ | 0.061 gal |
| 15 in³ | 0.065 gal |