Cup to Fluid ounce Conversion Calculator: Free Online Tool
Convert cups to fluid ounces with our free online volume converter.
Cup to Fluid ounce Calculator
How to Use the Calculator:
- Enter the value you want to convert in the 'From' field (Cup).
- The converted value in Fluid ounce will appear automatically in the 'To' field.
- Use the dropdown menus to select different units within the Volume category.
- Click the swap button (⇌) to reverse the conversion direction.
How to Convert Cup to Fluid ounce
Converting Cup to Fluid ounce involves multiplying the value by a specific conversion factor, as shown in the formula below.
Formula:
1 Cup = 8 fluid ouncesExample Calculation:
Convert 10 cups: 10 × 8 = 80 fluid ounces
Disclaimer: For Reference Only
These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.
Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.
What is a Cup and a Fluid ounce?
The cup is a unit of volume used in cooking and measurements. The most common definition is the US customary cup (approx. 236.59 ml), but other definitions exist (e.g., metric cup = 250 ml).
The fluid ounce is a unit of volume. The US fluid ounce is defined as 1/128 of a US gallon (approx. 29.57 ml). The Imperial fluid ounce is 1/160 of an Imperial gallon (approx. 28.41 ml).
Note: The Cup is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Fluid ounce belongs to the imperial/US customary system.
History of the Cup and Fluid ounce
The cup evolved as a traditional, informal unit of measurement in cooking, often related to the size of a typical teacup.
Derived from the ounce unit of weight/mass, adapted to measure the volume of liquids like wine or water.
Common Uses for cups and fluid ounces
Explore the typical applications for both Cup (imperial/US) and Fluid ounce (imperial/US) to understand their common contexts.
Common Uses for cups
- Cooking: Widely used in recipes, especially in North America, for measuring both liquid and dry ingredients.
- Beverages: Measuring coffee and tea portions in home brewing.
- Breakfast: Portioning breakfast cereals and grains.
- Staple Foods: Measuring rice, pasta, and other staple foods before cooking.
- Baking: Used in baking for flour, sugar, and other dry ingredients.
- Storage: Common unit for household food storage containers.
- Nutrition: Measuring serving sizes in dietary guidelines and nutrition information.
Common Uses for fluid ounces
- Beverages: Measuring alcoholic drinks, soft drinks, and coffee servings.
- Cooking: Recipe measurements for smaller liquid ingredients.
- Medicine: Liquid medication dosages on prescription labels.
- Personal Care: Volumes of cosmetics, perfumes, and essential oils.
- Nutrition Labels: Serving sizes on food and beverage packaging.
Frequently Asked Questions
Questions About Cup (cup)
Is a cup the same everywhere?
No, the volume of a "cup" can vary significantly by region (e.g., US customary ≈ 237 mL, US legal = 240 mL, metric = 250 mL, imperial ≈ 284 mL). This converter primarily uses the US customary cup unless otherwise specified in the context of a specific conversion pair.
How many tablespoons are in a cup?
In the US customary system, there are 16 tablespoons in 1 cup. This is a useful conversion to remember for scaling recipes up or down, especially when working with smaller quantities.
Is a dry cup different from a liquid cup?
Yes, in the US customary system, there is a distinction between dry and liquid cup measurements. While they have the same volume (8 fluid ounces), they are measured differently. Liquid cups are typically measured to the brim in a liquid measuring cup, while dry cups are measured by filling and leveling off in a dry measuring cup. For precise cooking results, it's best to use the appropriate measuring tool for each type of ingredient.
About Fluid ounce (fl oz)
Is a US fluid ounce the same as a UK fluid ounce?
No, the Imperial (UK) fluid ounce is slightly smaller than the US fluid ounce (approximately 28.41 ml vs 29.57 ml).
Is a fluid ounce the same as a weight ounce?
No, a fluid ounce measures volume (the space something occupies), while a weight ounce (specifically an avoirdupois ounce) measures mass (how much matter it contains). The relationship between the two depends entirely on the density of the substance being measured. For water, 1 US fluid ounce weighs approximately 1.04 avoirdupois ounces.
Conversion Table: Cup to Fluid ounce
| Cup (cup) | Fluid ounce (fl oz) |
|---|---|
| 1 | 8 |
| 5 | 40 |
| 10 | 80 |
| 25 | 200 |
| 50 | 400 |
| 100 | 800 |
| 500 | 4,000 |
| 1,000 | 8,000 |