conversions
Ounces to Cups
Last updated: May 31, 2026
Written by Blake Boege
An ounces to cups converter is a kitchen volume utility designed to translate US fluid ounces into cups. It operates on the volume standard where one cup equals exactly 8 fluid ounces. Note that this measures fluid capacity; dry ounces measure weight and vary by ingredient density.
Convert fluid ounces to cups instantly. Read the conversion answers, the mathematical formula, and browse the reference lookup table.
Quick Answer
Convert fluid ounces to cups instantly. 1 US cup is equal to exactly 8 fluid ounces.
Ounces to Cups
Bidirectional Ounces to Cups Converter
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Answer
1 cup
8 fl oz = 1 cup
Ounces to Cups Reference Table
| Fluid Ounces (fl oz) | Cups (cup) | Description |
|---|---|---|
| 1 fl oz | 0.125 cup | Two tablespoons volume |
| 4 fl oz | 0.500 cup | Half a cup volume |
| 8 fl oz | 1.000 cup | Exactly one standard cup volume |
| 16 fl oz | 2.000 cups | One pint / two cups volume |
| 32 fl oz | 4.000 cups | One quart / four cups volume |
| 100 fl oz | 12.500 cups | Twelve and a half cups |
Examples
8 fl oz
1 cup
How it works
To convert fluid ounces (fl oz) to cups (cup), perform the following calculation:
Formula
cups = fl oz ÷ 8
Method
Multiply fluid ounces by 0.125 to get cups.
Note: This converter works for volume (fluid ounces). For dry ingredients (like flour, oats, or sugar), ounces measure weight instead of volume. The dry weight equivalent of a cup varies significantly depending on the ingredient's density.
Understanding Ounces to Cups Conversions
Converting measurements between metric and imperial scales, or relative speed, capacity, and volume benchmarks, is essential in sciences, cooking, engineering, and daily travel. Using standard multipliers guarantees precision and alignment across different measurement systems.
Fluid Ounces vs. Dry/Weight Ounces
It is critical to distinguish between fluid ounces (fl oz) and dry ounces (oz). Fluid ounces measure liquid volume (space), and 1 US cup is always exactly 8 fluid ounces of any liquid. Dry ounces measure weight (heaviness), meaning the weight of a cup varies based on ingredient density. For example, 1 cup of all-purpose flour weighs approximately 4.25 ounces, whereas 1 cup of granulated white sugar weighs approximately 7 ounces. Always verify whether your recipe requires liquid volume or dry weight!
How to convert fluid ounces to cups
To perform the conversion manually, use the formula cups = fl oz ÷ 8. For example, to convert 100 fluid ounces into cups, multiply 100 by 0.125, yielding 12.5 cup.
How to convert cups to fluid ounces
To reverse the conversion, use the formula fl oz = cups × 8. For instance, if you have 10 cups, divide 10 by 0.125 (or multiply by its reciprocal 8), which equals 80 fl oz.
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Frequently asked questions
Divide the fluid ounces value by 8. For example, 24 fluid ounces = 24 ÷ 8 = 3 cups.
16 fluid ounces is equal to exactly 2 cups.
Fluid ounces (fl oz) measure volume, meaning the amount of space a liquid occupies (1 cup is exactly 8 fl oz of any liquid). Dry ounces measure weight (mass) and vary by ingredient density; for example, 1 cup of flour weighs about 4.25 ounces, while 1 cup of sugar weighs about 7 ounces.
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