Convert Cubic feet to US gallons
1 cubic foot is 7.48 gal. One cubic foot is exactly 7.48051948052 US gallons.
One cubic foot is 7.4805195 US gallons. To convert cubic feet to US gallons, multiply by 7.4805195; to go the other way, divide by 7.4805195 or multiply by 0.13368056. The relation is exact but the figure is not: it is a rounding of a number that does not terminate, and it follows from NIST Handbook 130. Exactly 28.316846592 litres, or 7.48 US gallons.
Factor checked against the defining standard · How we check
- Cubic feet × 7.4805195
1 * 7.48051957.481 gal
1 cubic foot in every volume unit
| Unit | Value | Exact factor |
|---|---|---|
| US teaspoons | 5,745.038961 tsp | × 5,745.03896104 |
| US tablespoons | 1,915.012987 tbsp | × 1,915.01298701 |
| US fluid ounces | 957.5064935 fl oz | × 957.506493506 |
| US cups | 119.6883117 cup | × 119.688311688 |
| US pints | 59.84415584 pt | × 59.8441558442 |
| US quarts | 29.92207792 qt | × 29.9220779221 |
| US gallons | 7.480519481 gal | × 7.48051948052 |
| milliliters | 28,316.84659 ml | × 28,316.846592 |
| liters | 28.31684659 L | × 28.316846592 |
| imperial gallons | 6.228835459 gal (UK) | × 6.22883545904 |
| imperial quarts | 24.91534184 qt (UK) | × 24.9153418362 |
| imperial pints | 49.83068367 pt (UK) | × 49.8306836723 |
| imperial fluid ounces | 996.6136734 fl oz (UK) | × 996.613673447 |
| imperial gills | 199.3227347 gi (UK) | × 199.322734689 |
| cubic millimetres | 28,316,846.59 mm³ | × 28,316,846.592 |
| cubic centimetres | 28,316.84659 cm³ | × 28,316.846592 |
| cubic inches | 1,728 in³ | × 1,728 |
| cubic feet (as entered) | 1 ft³ | — |
| cubic yards | 0.03703703704 yd³ | × 0.037037037037 |
| cubic metres | 0.02831684659 m³ | × 0.028316846592 |
Factors are entered by hand from NIST Handbook 130 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert cubic feet to US gallons? The converter and the working
- 1.Take the measurement in cubic feet.
- 2.Multiply by 7.4805195 — that is how many US gallons fit in one cubic foot.
- 3.To go back the other way, divide by 7.4805195, or multiply by 0.13368056.
Worked example: 25 cubic feet to US gallons
- Formula
- ft³ × 7.4805195 = gal
- Arithmetic
- 25 × 7.4805195 = 187.01 gal
- Answer
- 25 ft³ = 187.01 gal
The factor is rounded for display; the figure above is computed from the full value.
Cubic feet to US gallons conversion table
| Cubic feet | US gallons |
|---|---|
| 1 ft³ | 7.48 gal |
| 2 ft³ | 14.96 gal |
| 3 ft³ | 22.44 gal |
| 4 ft³ | 29.92 gal |
| 5 ft³ | 37.4 gal |
| 6 ft³ | 44.88 gal |
| 7 ft³ | 52.36 gal |
| 8 ft³ | 59.84 gal |
| 9 ft³ | 67.32 gal |
| 10 ft³ | 74.81 gal |
| 12 ft³ | 89.77 gal |
| 15 ft³ | 112.21 gal |
| 20 ft³ | 149.61 gal |
| 25 ft³ | 187.01 gal |
| 50 ft³ | 374.03 gal |
| 100 ft³ | 748.05 gal |
| 200 ft³ | 1,496.1 gal |
| 300 ft³ | 2,244.16 gal |
| 500 ft³ | 3,740.26 gal |
| 1000 ft³ | 7,480.52 gal |
| 2000 ft³ | 14,961.04 gal |
| 5000 ft³ | 37,402.6 gal |
| 10000 ft³ | 74,805.19 gal |
7.48 US gallons to the cubic foot, and 6.23 imperial ones
A cubic foot is 28.3168 litres, which is 7.4805 US gallons or 6.2288 imperial. Water billing, pool volumes and gas meters all cross this line: a US water meter reads in hundreds of cubic feet — one HCF is 748 gallons — and a bill quoted in gallons against a meter reading in CCF is out by a factor of 748 if the conversion is skipped.
NIST Handbook 44, Appendix C — general tables of units of measurement
What is a cubic foot?
Exactly 28.316846592 litres, or 7.48 US gallons. The working unit of natural gas billing, air flow and refrigerator capacity in the US.
What is a US gallon?
Exactly 231 cubic inches. The imperial gallon is 4.546 liters, so US and UK fuel economy figures are not comparable.
How many US gallons are in a cubic foot?
One cubic foot is 7.4805195 US gallons. Going the other way, one US gallon is 0.13368056 cubic feet. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every volume unit here
The whole group — 20 units with their symbols and the size of each one in liters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a cubic foot.
Cite this page
- APA
- Rule Calculator. (2026). Convert Cubic feet to US gallons. Rule Calculator. https://rulecalculators.com/convert/cubic-foot-to-gallon
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- Chicago
- Rule Calculator. "Convert Cubic feet to US gallons." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/cubic-foot-to-gallon.
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Questions people actually ask
- How many US gallons are in a cubic foot?
- 7.4805195. Exactly 231 cubic inches. The imperial gallon is 4.546 liters, so US and UK fuel economy figures are not comparable.
- How do I convert US gallons back to cubic feet?
- Divide by 7.4805195, or multiply by 0.13368056 — they are the same operation.
Other volume conversions
US gallons to cubic feet — the same conversion the other way.