Volume conversion
Imperial fluid ounce to US customary cup converter
Convert imp fl oz to cup instantly, choose the displayed precision, and verify the result with the formula and reference table below.
US customary cup (cup)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Calculation
Imperial fluid ounce to US customary cup formula
cup = imp fl oz × 0.120095
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 imp fl oz, the result is 1.20095 cup. Substitute 10 imp fl oz into the formula to obtain 1.20095 cup.
A numerical value expressed in us customary cup is usually smaller than the same measurement expressed in imperial fluid ounce, because 1 imp fl oz equals 0.120095 cup.
Imperial fluid ounce to US customary cup reference table
Common values rounded to a maximum of 6 decimal places.
| Imperial fluid ounce (imp fl oz) | US customary cup (cup) |
|---|---|
| 1 imp fl oz | 0.120095 cup |
| 5 imp fl oz | 0.600475 cup |
| 10 imp fl oz | 1.20095 cup |
| 50 imp fl oz | 6.00475 cup |
| 100 imp fl oz | 12.009499 cup |
Understanding the units
About Imperial fluid ounce and US customary cup
Imperial fluid ounce (imp fl oz)
One imperial fluid ounce (imp fl oz) equals 0.028413063 L, the base relationship used for this volume conversion.
US customary cup (cup)
One us customary cup (cup) equals 0.236588237 L, the base relationship used for this volume conversion.
When this conversion is useful
Imperial fluid ounce to US customary cup conversion is useful for recipes, beverage quantities, fuel volumes, laboratory measurements, and container capacities. It lets you compare the same volume or capacity across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
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Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →Everyday conversionsUS Gallons vs Imperial Gallons: What Is the Difference?
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Read guide →Answers at a glance
Frequently asked questions
How do you convert Imperial fluid ounce to US customary cup?
Use the formula cup = imp fl oz × 0.120095. Enter any value in the converter above to calculate the result instantly.
How many us customary cup are in one imperial fluid ounce?
One imperial fluid ounce equals 0.120095 us customary cup.
How does Convr round Imperial fluid ounce to US customary cup results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal imperial fluid ounce values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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