Convert Cups to Fluid Ounces (US)

1 Cups = 8 Fluid Ounces (US)
cup
8
fl oz
Formula: fl oz = cup × 8
Cups (cup)Fluid Ounces (US) (fl oz)
18
216
540
1080
25200
50400
100800
2502000
5004000
10008000

How to Convert Cups to Fluid Ounces (US)

Volume conversion is used daily in cooking, chemistry, fuel measurement, and manufacturing. Understanding how to convert between Cups and Fluid Ounces (US) helps bridge metric and imperial systems. For quick reference: 1 US gallon ≈ 3.79 liters, 1 liter ≈ 33.8 fl oz, and a standard water bottle is 500 mL (about 17 fl oz).

Conversion Formula

fl oz = cup × 8

The factor 8.00000 represents how many fl oz equal one cup. This relationship is fixed and based on the defined sizes of each unit.

Step-by-Step Examples

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Frequently Asked Questions

How do I convert Cups to Fluid Ounces (US)?

Multiply the value in Cups by 8.00000. For example, 10 cup = 80.0000 fl oz.

What is the difference between US and UK gallons?

A US gallon is 3.78541 liters, while a UK (Imperial) gallon is 4.54609 liters — about 20% larger. Always check which gallon is being referenced.

How many Fluid Ounces (US) are in one Cup?

One cup equals 8.00000 fl oz. Use this factor for any conversion between these units.

Is this conversion exact?

The conversion factor 8.00000 is accurate to six significant figures, suitable for cooking, science, and industrial applications.

What are common volume references in both metric and US units?

A standard water bottle is 500 mL (about 16.9 fl oz). 1 US gallon ≈ 3.79 liters. 1 liter ≈ 33.8 fl oz (about 4.2 US cups). A US cup is 236.6 mL (8 fl oz). A tablespoon is about 14.8 mL (0.5 fl oz). A bathtub holds roughly 300 liters (80 US gallons).