An imperial fluid ounce is 1/160 of an imperial gallon.
Imperial fluid ounces to Cubic feet Converter — imp fl oz to ft3
Convert Imperial fluid ounce (imp fl oz) to Cubic foot (ft3) using the exact conversion factor (1 imperial fluid ounce = 0.0010033978 cubic foot). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Imperial fluid ounces to Cubic feet converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A cubic foot is exactly 0.028316846592 cubic meters.
Result = input x 2.84130625e-5 / 0.02831684659.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial fluid ounces to Cubic feet
Imperial fluid ounce and Cubic foot appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Imperial fluid ounce is typically associated with united Kingdom (historically; less common in current UK retail than metric units), while Cubic foot is typically associated with united States (construction, HVAC, natural gas billing).
Formula
cubic feet = imperial fluid ounces × 0.00100339783272
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial fluid ounce equals 0.0000284130625 base units, and 1 cubic foot equals 0.028316846592 base units, so dividing one by the other gives the direct imperial fluid ounce-to-cubic foot factor of 0.00100339783272.
Simple example
1 imp fl oz × 0.001003397833 = 0.0010033978 ft3
1 imperial fluid ounce = 0.0010033978 cubic feet.
Real-world example
10 imp fl oz × 0.001003397833 = 0.0100339783 ft3
10 imperial fluid ounces = 0.0100339783 cubic feet.
Conversion table
| Imperial fluid ounce (imp fl oz) | Cubic foot (ft3) |
|---|---|
| 1 imp fl oz | 0.0010033978 ft3 |
| 5 imp fl oz | 0.0050169892 ft3 |
| 10 imp fl oz | 0.0100339783 ft3 |
| 25 imp fl oz | 0.0250849458 ft3 |
| 50 imp fl oz | 0.0501698916 ft3 |
| 100 imp fl oz | 0.1003397833 ft3 |
Reverse conversion: Cubic foot to Imperial fluid ounce
0.0010033978 ft3 × 996.6136734 = 0.9999999674 imp fl oz
0.0010033978 cubic feet = 0.9999999674 imperial fluid ounces.
imperial fluid ounces = cubic feet × 996.613673447
For a page dedicated to this direction, see Cubic foot to Imperial fluid ounce.
Imperial fluid ounce vs. Cubic foot
| Aspect | Imperial fluid ounce | Cubic foot |
|---|---|---|
| Family | UK/imperial customary unit | US/imperial customary unit |
| Typical use | UK/Commonwealth beverage measurement in historical or specialized contexts | US natural gas utility billing (often in hundreds or thousands of cubic feet) |
| Where it's used | United Kingdom (historically; less common in current UK retail than metric units) | United States (construction, HVAC, natural gas billing) |
Understanding the Imperial fluid ounce
Imperial fluid ounce (imp fl oz) measures volume. The imperial fluid ounce is 1/160 of an imperial gallon: exactly 28.4130625 milliliters — slightly smaller than the US fluid ounce despite the larger imperial gallon, because it divides that gallon into more parts. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom (historically; less common in current UK retail than metric units)
Imperial fluid ounce vs. US fluid ounce. Confusingly, the imperial fluid ounce (28.41 mL) is slightly smaller than the US fluid ounce (29.57 mL), even though the imperial gallon is larger overall — because the imperial gallon is divided into 160 fluid ounces rather than the US gallon's 128.
Uses of the Imperial fluid ounce today
- UK/Commonwealth beverage measurement in historical or specialized contexts
History of the Imperial fluid ounce
The imperial fluid ounce follows from Britain's 1824 imperial gallon, divided into 160 parts rather than the 128 used in the US system, producing its counterintuitively smaller size relative to the US fluid ounce.
Historical origin. Imperial fluid ounce was not the invention of a single named person; it developed through the process described above.
Understanding the Cubic foot
Cubic foot (ft3) measures volume. A cubic foot is exactly 0.028316846592 cubic meters, derived from the 1959 international foot. It is classified as a US/imperial customary unit.
Where it's used: United States (construction, HVAC, natural gas billing)
Uses of the Cubic foot today
- US natural gas utility billing (often in hundreds or thousands of cubic feet)
- HVAC airflow and building-volume calculations
- Lumber, concrete, and construction material estimation in the US
History of the Cubic foot
The cubic foot, like the square foot, follows from the standardized foot (exactly 0.3048 m since the 1959 international agreement) rather than having a separate historical definition.
Historical origin. Cubic foot was not the invention of a single named person; it developed through the process described above.
Imperial fluid ounce — sources
- UK Weights and Measures Act 1824 — Basis for the imperial fluid ounce via the imperial gallon.
Cubic foot — sources
- NIST — International yard and pound (1959) — Basis for the modern foot and its derived volume unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic feet are in 1 imperial fluid ounce?
1 imperial fluid ounce equals 0.0010033978 cubic feet, using the exact defined conversion factor rather than an estimate.
How do I convert imperial fluid ounce to cubic foot?
Multiply the imperial fluid ounce value by 0.001003397833. The converter above does this instantly to whatever precision you set.
How do I convert cubic foot back to imperial fluid ounce?
Use the reverse factor: 1 cubic foot equals 996.6136734 imperial fluid ounces. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial fluid ounce?
Imperial fluid ounce (imp fl oz) measures volume. The imperial fluid ounce is 1/160 of an imperial gallon: exactly 28.4130625 milliliters — slightly smaller than the US fluid ounce despite the larger imperial gallon, because it divides that gallon into more parts. It is classified as a UK/imperial customary unit.
What is a cubic foot?
Cubic foot (ft3) measures volume. A cubic foot is exactly 0.028316846592 cubic meters, derived from the 1959 international foot. It is classified as a US/imperial customary unit.
Is the imperial fluid ounce to cubic foot conversion exact?
Yes. A cubic foot is exactly 0.028316846592 cubic meters, derived from the 1959 international foot. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between imperial fluid ounce vs. us fluid ounce?
Confusingly, the imperial fluid ounce (28.41 mL) is slightly smaller than the US fluid ounce (29.57 mL), even though the imperial gallon is larger overall — because the imperial gallon is divided into 160 fluid ounces rather than the US gallon's 128.
Where is the imperial fluid ounce still used today?
United Kingdom (historically; less common in current UK retail than metric units)