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Cups to Fluid Ounces Converter

Convert cups to fluid ounces and fluid ounces to cups instantly. Bidirectional volume converter with formula and common values.

cup

Fluid Ounces

20

fl oz

2.5 cup = 20 fl oz

fl oz = cup × 8

How to Convert Cups to Fluid Ounces

To convert cups to fluid ounces, multiply by 8. One US customary cup is defined as exactly 8 US fluid ounces, making this a straightforward whole-number conversion.

Conversion Formula

  • Cups to Fluid Ounces: fl oz = cup × 8
  • Fluid Ounces to Cups: cup = fl oz ÷ 8

Common Conversions

CupsFluid Ounces
0.252
0.54
0.756
1.512
216
3.528
432

Related

FAQ

How many fluid ounces are in a cup?

One US cup equals exactly 8 US fluid ounces.

How do I convert cups to fluid ounces?

Multiply the number of cups by 8. For example, 3.5 cups × 8 = 28 fl oz.

Is a cup the same in all countries?

No. A US cup is 8 fl oz (236.588 mL), while an imperial cup is 10 imperial fl oz (284.131 mL). This converter uses US measurements.

How many fluid ounces are in half a cup?

Half a cup equals 4 fluid ounces.