How many cubic feet are in one US gallon?
One US gallon is exactly 0.133680555556 cubic feet.
Convert gallon (US) (gal (US)) to cubic foot (ft^3) instantly.
Formula
value × 0.133680555556
| Sample | Converted |
|---|---|
| 1 gal (US) | 0.133681 ft^3 |
| 5 gal (US) | 0.668403 ft^3 |
| 10 gal (US) | 1.336806 ft^3 |
| 100 gal (US) | 13.368056 ft^3 |
| 1,000 gal (US) | 133.680556 ft^3 |
Use this page when a volume in US gallons needs to be converted into cubic feet. This is useful for tanks, aquariums, water storage, appliances, pools, freight, HVAC-related volume, and any liquid capacity that needs to be compared with space or storage volume.
US gallons measure liquid capacity. Cubic feet measure three-dimensional volume.
This conversion is useful when liquid volume must be compared with container or space capacity.
The cubic-foot result will be smaller than the gallon value because one cubic foot holds several gallons.
For liquids, gallons may be more familiar than cubic feet.
For storage, freight, rooms, and appliances, cubic feet may be the expected unit.
This page converts volume only; square feet and feet of length use different conversions.
Gallons are common for liquid capacity, while cubic feet are common for physical space and storage.
This conversion helps compare a tank or liquid volume with a box, room, appliance, or freight rating.
It is especially useful for aquariums, reservoirs, water storage, and equipment planning.
A gallon value describes how much liquid fits in a container.
A cubic-foot value describes the three-dimensional space that volume occupies.
The two can be compared because both are volume, but neither should be confused with length or area.
1 US gal should equal exactly 0.133680555556 ft3.
7.48052 US gal should be about 1 ft3.
If a gallon value is converted using 12 or 3.28, a length factor has been used by mistake.
Definition: A US liquid gallon is a US customary volume unit equal to 231 cubic inches.
History/Origin: US gallons are used for liquid capacity in fuel, water, appliances, containers, and consumer products in the United States.
Current use: gal_us is used for fuel, water tanks, pools, aquariums, irrigation, beverages, appliances, and liquid storage.
Definition: A cubic foot is the volume of a cube one foot on each side.
History/Origin: Cubic feet are widely used in US storage, freight, appliances, HVAC, rooms, and material estimates.
Current use: ft3 is used for refrigerators, freezers, storage units, freight, rooms, soil, concrete, air volume, and bulk capacity.
| gallon (US) [gal (US)] | cubic foot [ft^3] |
|---|---|
| 0.01 gal (US) | 0.001337 ft^3 |
| 0.1 gal (US) | 0.013368 ft^3 |
| 1 gal (US) | 0.133681 ft^3 |
| 2 gal (US) | 0.267361 ft^3 |
| 5 gal (US) | 0.668403 ft^3 |
| 10 gal (US) | 1.336806 ft^3 |
| 20 gal (US) | 2.673611 ft^3 |
| 50 gal (US) | 6.684028 ft^3 |
| 100 gal (US) | 13.368056 ft^3 |
1 gal (US) = 0.133681 ft^3
1 ft^3 = 7.480519 gal (US)
Formula: value × 0.133680555556
Example: 15 gal (US) = 2.005208 ft^3
Precision note: Use the volume factor for US liquid gallons to cubic feet. Round according to whether the result is for storage, equipment, shipping, or broad planning.
One US gallon is exactly 0.133680555556 cubic feet.
One cubic foot contains about 7.48052 US gallons.
No. Cubic feet measure volume. Feet measure length.