Fluid Ounce (US) to Cup (US) Converter
Volume · unit-converter
Convert Fluid Ounce (US) to Cup (US) with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Fluid Ounce (US) (floz)
To: Cup (US) (cup)
About Fluid Ounce (US)
The US fluid ounce is 1/128 of a US gallon (about 29.5735 ml). US nutrition labels and recipes use fluid ounces for liquids.
About Cup (US)
The US customary cup is 236.588 ml (half a US liquid pint). US baking recipes frequently measure dry and liquid ingredients in cups.
How to convert fluid ounces (us) to cups (us)
1 fluid ounce (us) is equal to 0.125 cup (us):
1 floz = (0.0295735295625 L ÷ 0.2365882365 L) cup = 0.125 cup
Each fluid ounce (us) is defined as 0.0295735295625 L and each cup (us) as 0.2365882365 L, so one floz equals 0.0295735295625 ÷ 0.2365882365 cup = 0.125 cup.
Let V(floz) be the numeric value of the same volume measured in Fluid Ounce (US) (floz), and V(cup) the value in Cup (US) (cup). Then:
V(cup) = V(floz) × (0.0295735295625 / 0.2365882365)
Equivalently, divide by how many floz fit into one cup (liters per cup divided by liters per floz):
V(cup) = V(floz) ÷ 8
Or: cup (us) = fluid ounce (us) ÷ 8
Examples
Example #1: Convert 20 floz to cup (us)
20 floz = 20 floz × (0.0295735295625/0.2365882365) cup = 2.5 cup
20 floz = 20 floz ÷ 8 = 2.5 cup
Example #2: Convert 50 floz to cup (us)
50 floz = 50 floz × (0.0295735295625/0.2365882365) cup = 6.25 cup
50 floz = 50 floz ÷ 8 = 6.25 cup
Summary
To convert Fluid Ounce (US) to Cup (US), multiply the value in floz by the ratio of liters per floz divided by liters per cup. Equivalently: value_cup = value_floz × (0.0295735295625 / 0.2365882365). Numerically, 1 floz equals 0.125 cup.
Relationship context
Both units are US customary fluid / volume in this tool’s grouping. Conversions use fixed liter equivalents, so factors are consistent for cooking, engineering, and cross-checking labels. The factor from Fluid Ounce (US) to Cup (US) is 1.250000e-1 (1 floz = 0.125 cup).
Conversion tables
| Fluid Ounce (US) (floz) | Cup (US) (cup) |
|---|---|
| 0.1 | 0.0125 |
| 1 | 0.125 |
| 2 | 0.25 |
| 3 | 0.375 |
| 4 | 0.5 |
| 5 | 0.625 |
| 6 | 0.75 |
| 7 | 0.875 |
| 8 | 1 |
| 9 | 1.125 |
| Fluid Ounce (US) (floz) | Cup (US) (cup) |
|---|---|
| 10 | 1.25 |
| 20 | 2.5 |
| 30 | 3.75 |
| 40 | 5 |
| 50 | 6.25 |
| 60 | 7.5 |
| 70 | 8.75 |
| 80 | 10 |
| 90 | 11.25 |
| 100 | 12.5 |