Convert Fluid Ounces to Cups

Enter the volume in fluid ounces below to get the value converted to cups.

SWAP UNITS
Results in Cups:
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1 fl oz = 0.125 c

How to Convert Fluid Ounces to Cups

conversion scale showing fluid ounces and equivalent cups volume values

To convert a fluid ounce measurement to a cup measurement, divide the volume by the conversion ratio. One cup is equal to 8 fluid ounces, so use this simple formula to convert:

cups = fluid ounces ÷ 8

The volume in cups is equal to the fluid ounces divided by 8.

For example, here's how to convert 5 fluid ounces to cups using the formula above.
5 fl oz = (5 ÷ 8) = 0.625 c

Fluid ounces and cups are both units used to measure volume. Keep reading to learn more about each unit of measure.

Fluid Ounces

The US fluid ounce is a unit of volume equal to 1/16 of apint or 1/8 of a cup. The fluid ounce is sometimes referred to as an "ounce" but should not be confused with the unit of mass. One fluid ounce is equal to just under 29.6 milliliters, but in nutrition labelling, one fluid ounce is rounded to exactly 30 milliliters.[1]

The fluid ounce is a US customary unit of volume. Fluid ounces can be abbreviated as fl oz, and are also sometimes abbreviated as fl. oz. or oz. fl.. For example, 1 fluid ounce can be written as 1 fl oz, 1 fl. oz., or 1 oz. fl..

Cups

The cup is a unit of volume equal to 16 tablespoons or 8 fluid ounces. The cup should not be confused with the metric cup or the teacup, which are different units of volume. One cup is equal to just under 236.6 milliliters, but in nutrition labelling, one cup is equal to 240 milliliters.[2]

The cup is a US customary unit of volume. Cups can be abbreviated as c, and are also sometimes abbreviated as C. For example, 1 cup can be written as 1 c or 1 C.

Fluid Ounce to Cup Conversion Table

Fluid ounce measurements converted to cups
Fluid Ounces Cups
1 fl oz 0.125 c
2 fl oz 0.25 c
3 fl oz 0.375 c
4 fl oz 0.5 c
5 fl oz 0.625 c
6 fl oz 0.75 c
7 fl oz 0.875 c
8 fl oz 1 c
9 fl oz 1.125 c
10 fl oz 1.25 c
11 fl oz 1.375 c
12 fl oz 1.5 c
13 fl oz 1.625 c
14 fl oz 1.75 c
15 fl oz 1.875 c
16 fl oz 2 c
17 fl oz 2.125 c
18 fl oz 2.25 c
19 fl oz 2.375 c
20 fl oz 2.5 c
21 fl oz 2.625 c
22 fl oz 2.75 c
23 fl oz 2.875 c
24 fl oz 3 c
25 fl oz 3.125 c
26 fl oz 3.25 c
27 fl oz 3.375 c
28 fl oz 3.5 c
29 fl oz 3.625 c
30 fl oz 3.75 c
31 fl oz 3.875 c
32 fl oz 4 c
33 fl oz 4.125 c
34 fl oz 4.25 c
35 fl oz 4.375 c
36 fl oz 4.5 c
37 fl oz 4.625 c
38 fl oz 4.75 c
39 fl oz 4.875 c
40 fl oz 5 c

References

  1. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures
  2. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures, https://www.fda.gov/regulatory-information/search-fda-guidance-documents/guidance-industry-guidelines-determining-metric-equivalents-household-measures