Definition: A cubic inch (in³) is a unit of volume that corresponds to the volume of a cube with each side measuring one inch.
History/origin: The cubic inch is part of the imperial and US customary systems and has historically been used in engineering and automotive fields.
Current use: Cubic inches are used primarily in the United States, especially for measuring engine displacement in automobiles and motorcycles.
Definition: A US gallon is a unit of volume equal to 231 cubic inches, or about 3.785 liters.
History/origin: The gallon originated in England as a system of measuring wine and beer. The US adopted its own version based on the wine gallon.
Current use: The US gallon is used primarily in the United States to measure liquid volumes like fuel, milk, and other beverages.
| Cubic Inches [in³] | Gallons [US gal] |
|---|---|
| 1.00 | 0.004329 |
| 10.00 | 0.043290 |
| 50.00 | 0.216450 |
| 100.00 | 0.432900 |
| 231.00 | 1.000000 |
| 462.00 | 2.000000 |
| 500.00 | 2.164502 |
| 1000.00 | 4.329004 |
| 0.50 | 0.002165 |
| 0.10 | 0.000433 |
1 gallon (US) = 231 cubic inches
1 cubic inch ≈ 0.004329 gallons
Example: convert 462 cubic inches to gallons:
462 ÷ 231 = 2 gallons