Convert Cubic feet to Imperial gallons
1 cubic foot is 6.23 gal (UK). One cubic foot is exactly 6.22883545904 imperial gallons.
One cubic foot is 6.2288355 imperial gallons. To convert cubic feet to imperial gallons, multiply by 6.2288355; to go the other way, divide by 6.2288355 or multiply by 0.16054365. 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 × 6.2288355
1 * 6.22883556.229 gal (UK)
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 imperial gallons? The converter and the working
- 1.Take the measurement in cubic feet.
- 2.Multiply by 6.2288355 — that is how many imperial gallons fit in one cubic foot.
- 3.To go back the other way, divide by 6.2288355, or multiply by 0.16054365.
Worked example: 25 cubic feet to imperial gallons
- Formula
- ft³ × 6.2288355 = gal (UK)
- Arithmetic
- 25 × 6.2288355 = 155.72 gal (UK)
- Answer
- 25 ft³ = 155.72 gal (UK)
The factor is rounded for display; the figure above is computed from the full value.
Cubic feet to imperial gallons conversion table
| Cubic feet | Imperial gallons |
|---|---|
| 1 ft³ | 6.23 gal (UK) |
| 2 ft³ | 12.46 gal (UK) |
| 3 ft³ | 18.69 gal (UK) |
| 4 ft³ | 24.92 gal (UK) |
| 5 ft³ | 31.14 gal (UK) |
| 6 ft³ | 37.37 gal (UK) |
| 7 ft³ | 43.6 gal (UK) |
| 8 ft³ | 49.83 gal (UK) |
| 9 ft³ | 56.06 gal (UK) |
| 10 ft³ | 62.29 gal (UK) |
| 12 ft³ | 74.75 gal (UK) |
| 15 ft³ | 93.43 gal (UK) |
| 20 ft³ | 124.58 gal (UK) |
| 25 ft³ | 155.72 gal (UK) |
| 50 ft³ | 311.44 gal (UK) |
| 100 ft³ | 622.88 gal (UK) |
| 200 ft³ | 1,245.77 gal (UK) |
| 300 ft³ | 1,868.65 gal (UK) |
| 500 ft³ | 3,114.42 gal (UK) |
| 1000 ft³ | 6,228.84 gal (UK) |
| 2000 ft³ | 12,457.67 gal (UK) |
| 5000 ft³ | 31,144.18 gal (UK) |
| 10000 ft³ | 62,288.35 gal (UK) |
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 an imperial gallon?
Exactly 4.54609 liters since 1985, and the reason UK and US fuel economy figures cannot be compared: it is 20% larger than the US gallon, so 40 mpg in Britain is about 33 mpg in America on the same car.
How many imperial gallons are in a cubic foot?
One cubic foot is 6.2288355 imperial gallons. Going the other way, one imperial gallon is 0.16054365 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 imperial gallons. Rule Calculator. https://rulecalculators.com/convert/cubic-foot-to-imperial-gallon
- MLA
- "Convert Cubic feet to imperial gallons." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/cubic-foot-to-imperial-gallon.
- Chicago
- Rule Calculator. "Convert Cubic feet to imperial gallons." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/cubic-foot-to-imperial-gallon.
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Questions people actually ask
- How many imperial gallons are in a cubic foot?
- 6.2288355. Exactly 4.54609 liters since 1985, and the reason UK and US fuel economy figures cannot be compared: it is 20% larger than the US gallon, so 40 mpg in Britain is about 33 mpg in America on the same car.
- How do I convert imperial gallons back to cubic feet?
- Divide by 6.2288355, or multiply by 0.16054365 — they are the same operation.
Other volume conversions
Imperial gallons to cubic feet — the same conversion the other way.