A US fluid ounce is 1/128 of a US gallon.
Fluid ounces to Metric cups Converter — fl oz to metric cup
Convert Fluid ounce (fl oz) to Metric cup (metric cup) using the exact conversion factor (1 fluid ounce = 0.1182941182 metric cup). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
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 2.95735296e-5 / 0.00025.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Fluid ounces to Metric cups
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. Fluid ounce is typically associated with united States (beverage, nutrition labeling), while Metric cup is typically associated with australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement).
Formula
metric cups = fluid ounces × 0.11829411825
This factor comes from each unit's defined relationship to the category's base unit: 1 fluid ounce equals 0.0000295735295625 base units, and 1 metric cup equals 0.00025 base units, so dividing one by the other gives the direct fluid ounce-to-metric cup factor of 0.11829411825.
Simple example
1 fl oz × 0.1182941182 = 0.1182941182 metric cup
1 fluid ounce = 0.1182941182 metric cups.
Real-world example
10 fl oz × 0.1182941182 = 1.182941183 metric cup
10 fluid ounces = 1.182941183 metric cups.
Conversion table
| Fluid ounce (fl oz) | Metric cup (metric cup) |
|---|---|
| 1 fl oz | 0.1182941182 metric cup |
| 5 fl oz | 0.5914705913 metric cup |
| 10 fl oz | 1.182941183 metric cup |
| 25 fl oz | 2.957352956 metric cup |
| 50 fl oz | 5.914705912 metric cup |
| 100 fl oz | 11.82941182 metric cup |
Reverse conversion: Metric cup to Fluid ounce
0.1182941182 metric cup × 8.453505675 = 0.9999999996 fl oz
0.1182941182 metric cups = 0.9999999996 fluid ounces.
fluid ounces = metric cups × 8.45350567546
For a page dedicated to this direction, see Metric cup to Fluid ounce.
Fluid ounce vs. Metric cup
| Aspect | Fluid ounce | Metric cup |
|---|---|---|
| Family | US customary unit | Non-SI unit (culinary, metric countries) |
| Typical use | US beverage container sizing (soda, water bottles) | Recipe and cooking measurement in metric-using English-speaking countries |
| Where it's used | United States (beverage, nutrition labeling) | Australia, New Zealand, United Kingdom, Canada (recipes and cooking measurement) |
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. 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.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
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 fluid ounce?
1 fluid ounce equals 0.1182941182 metric cups, using the exact defined conversion factor rather than an estimate.
How do I convert fluid ounce to metric cup?
Multiply the fluid ounce value by 0.1182941182. The converter above does this instantly to whatever precision you set.
How do I convert metric cup back to fluid ounce?
Use the reverse factor: 1 metric cup equals 8.453505675 fluid ounces. You can also use the swap control in the converter above to flip the direction instantly.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US 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 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 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.
Where is the fluid ounce still used today?
United States (beverage, nutrition labeling)