An imperial fluid ounce is 1/160 of an imperial gallon.
Imperial fluid ounces to Metric cups Converter — imp fl oz to metric cup
Convert Imperial fluid ounce (imp fl oz) to Metric cup (metric cup) using the exact conversion factor (1 imperial fluid ounce = 0.11365225 metric cup). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Imperial fluid ounces to Metric cups 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 metric cup is 250 milliliters.
Result = input x 2.84130625e-5 / 0.00025.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial fluid ounces to Metric cups
Imperial fluid ounce and Metric cup 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 Metric cup is typically associated with australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement).
Formula
metric cups = imperial fluid ounces × 0.11365225
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 metric cup equals 0.00025 base units, so dividing one by the other gives the direct imperial fluid ounce-to-metric cup factor of 0.11365225.
Simple example
1 imp fl oz × 0.11365225 = 0.11365225 metric cup
1 imperial fluid ounce = 0.11365225 metric cups.
Real-world example
10 imp fl oz × 0.11365225 = 1.1365225 metric cup
10 imperial fluid ounces = 1.1365225 metric cups.
Conversion table
| Imperial fluid ounce (imp fl oz) | Metric cup (metric cup) |
|---|---|
| 1 imp fl oz | 0.11365225 metric cup |
| 5 imp fl oz | 0.56826125 metric cup |
| 10 imp fl oz | 1.1365225 metric cup |
| 25 imp fl oz | 2.84130625 metric cup |
| 50 imp fl oz | 5.6826125 metric cup |
| 100 imp fl oz | 11.365225 metric cup |
Reverse conversion: Metric cup to Imperial fluid ounce
0.11365225 metric cup × 8.798769932 = 1 imp fl oz
0.11365225 metric cups = 1 imperial fluid ounces.
imperial fluid ounces = metric cups × 8.79876993196
For a page dedicated to this direction, see Metric cup to Imperial fluid ounce.
Imperial fluid ounce vs. Metric cup
| Aspect | Imperial fluid ounce | Metric cup |
|---|---|---|
| Family | UK/imperial customary unit | Non-SI unit (culinary, metric countries) |
| Typical use | UK/Commonwealth beverage measurement in historical or specialized contexts | Recipe and cooking measurement in metric-using English-speaking countries |
| Where it's used | United Kingdom (historically; less common in current UK retail than metric units) | Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement) |
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 Metric cup
Metric cup (metric cup) measures volume. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. It is classified as a Non-SI unit (culinary, metric countries).
Where it's used: Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement)
Metric cup vs. US cup. The metric cup (250 mL) is about 4% larger than the US cooking cup (240 mL) — small for most recipes, but worth checking when following a recipe from a different country.
Uses of the Metric cup today
- Recipe and cooking measurement in metric-using English-speaking countries
- Baking and portion measurement
History of the Metric cup
As Commonwealth countries metricated through the 20th century, cookbook publishers and standards bodies adopted a round 250 mL 'metric cup' so recipes could use a convenient, easily-scaled volume rather than the US's 240 mL or older imperial teacup conventions.
Historical origin. Metric cup 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.
Metric cup — sources
- National Measurement Institute (Australia) — Kitchen measures — Documents the 250 mL metric cup standard.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many metric cups are in 1 imperial fluid ounce?
1 imperial fluid ounce equals 0.11365225 metric cups, using the exact defined conversion factor rather than an estimate.
How do I convert imperial fluid ounce to metric cup?
Multiply the imperial fluid ounce value by 0.11365225. The converter above does this instantly to whatever precision you set.
How do I convert metric cup back to imperial fluid ounce?
Use the reverse factor: 1 metric cup equals 8.798769932 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 metric cup?
Metric cup (metric cup) measures volume. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. It is classified as a Non-SI unit (culinary, metric countries).
Is the imperial fluid ounce to metric cup conversion exact?
Yes. The metric cup used in Australia, New Zealand, the UK, and Canada is defined as exactly 250 milliliters. 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)