4.5 Ounces to Cups

4.5 fl oz = 0.5625 cup

Calculation: cup = 4.5 fl oz × 0.125 = 0.5625 cup

Ounce to Cup Converter

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How much is 4.5 fl oz?

133 mL (4.5 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

What does 4.5 fl oz look like?

Illustration of a rocks glass
133 mL (4.5 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

4.5 fl oz on the cup scale

fl oz0246810cup00.20.40.60.811.2

4.5 fl oz = 0.5625 cup

How to Convert Ounce to Cup

1 ounce = 18 cups

Cup = Ounce × 18

Example: 4 12 fl oz × 18 = 916 cup

Reverse Conversion

To convert cups back to ounces:

  • Remember, 1 cup equals 8 ounces.
  • To convert 916 cup to fl oz, multiply 916 x 8, resulting in 4 12 fl oz.

4 12 fl oz is also equal to:

Frequently Asked Questions

How much is 4.5 ounces in cups?

4.5 ounces equals 0.5625 cups. This is calculated by multiplying 4.5 by the conversion factor 0.125.

What does 4.5 ounces look like in cups?

4.5 ounces (0.5625 cups) is a small cup of liquid — half a measuring cup.

How do you calculate 4.5 ounces to cups?

Multiply 4.5 by the conversion factor 0.125. The calculation is 4.5 × 0.125 = 0.5625 cups. This factor is defined by international measurement standards.

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4.5 ounces = 0.5625 cups
4.5 ounces = 0.5625 cups — conversion chart

Nearby Conversions

0.5 ounces0.0625 cups 1.5 ounces0.1875 cups 2.5 ounces0.3125 cups 3.5 ounces0.4375 cups 5.5 ounces0.6875 cups 6.5 ounces0.8125 cups 7.5 ounces0.9375 cups 8.5 ounces1.063 cups 9.5 ounces1.188 cups 10.5 ounces1.313 cups 11.5 ounces1.438 cups 12.5 ounces1.563 cups 13.5 ounces1.688 cups 14.5 ounces1.813 cups

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

Also convert Ounces 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.