1 Cup to Ounces

1 cup = 8 fl oz

Calculation: fl oz = 1 cup × 8 = 8 fl oz

Cup to Ounce Converter

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How much is 1 cup?

237 mL (8.0 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

What does 1 cup look like?

Illustration of a rocks glass
237 mL (8.0 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

1 cup on the ounce scale

cup00.511.52fl oz0246810121416

1 cup = 8 fl oz

Did you know? One US cup is 240 mL.

1 US cup = 240 mL = 8 fl oz. The metric cup used in Australia and NZ is 250 mL.

How to Convert Cup to Ounce

1 cup = 8 ounces

Ounce = Cup × 8

Example: 1 cup × 8 = 8 fl oz

Reverse Conversion

To convert ounces back to cups:

  • Remember, 1 ounce equals 18 cups.
  • To convert 8 fl oz to cup, multiply 8 x 18, resulting in 1 cup.

1 cup is also equal to:

Frequently Asked Questions

How much is 1 cup in ounces?

1 cup equals 8 ounces. This is calculated by multiplying 1 by the conversion factor 8.

What does 1 cup look like in ounces?

1 cup (8 ounces) is a few cups — a typical recipe quantity.

How do you calculate 1 cup to ounces?

Multiply 1 by the conversion factor 8. The calculation is 1 × 8 = 8 ounces. This factor is defined by international measurement standards.

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1 cup = 8 ounces
1 cup = 8 ounces — conversion chart

Nearby Conversions

0.333 cups2.664 ounces 0.5 cups4 ounces 0.667 cups5.336 ounces 0.75 cups6 ounces 1.25 cups10 ounces 1.5 cups12 ounces 1.75 cups14 ounces 2 cups16 ounces

For general conversions between cups and ounces, see the cups to ounces converter.

Also convert Cups to:

Conversion factors verified against NIST, BIPM, ISO 80000-3 1 US gallon = 3.785411784 L (exact, US customary). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.