Conversion Formula
$$V_{\text{gal}} = V_{\text{ft³}} \times 7.48052$$
Multiply cubic feet by 7.48052 to get US gallons.
ft³ to gal Conversion Table
| Cubic Foot (ft³) | US Gallon (gal) |
|---|---|
| 0.1 | 0.748052 |
| 0.5 | 3.74026 |
| 1 | 7.48052 |
| 2 | 14.961 |
| 5 | 37.4026 |
| 10 | 74.8052 |
| 25 | 187.013 |
| 50 | 374.026 |
| 100 | 748.052 |
| 250 | 1,870.13 |
| 500 | 3,740.26 |
| 1,000 | 7,480.52 |
ft³ to gal in Engineering
Volume conversions are critical for concrete and earthwork quantities (cubic yards), water storage (acre-feet, million gallons), petroleum (barrels), and fluid system design (liters, gallons). Accurate volume conversion prevents costly material estimation errors.
Cubic Foot: Primary US unit for gas volume, concrete, and storage tank capacity. Used in HVAC air volume calculations.
US Gallon: Standard US liquid volume unit. Exactly 231 cubic inches. Used for water, fuel, and chemical volumes.