4.2 Ounces to Cups

4.2 fl oz = 0.525 cup

Calculation: cup = 4.2 fl oz × 0.125 = 0.525 cup

Ounce to Cup Converter

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How much is 4.2 fl oz?

124 mL (4.2 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

What does 4.2 fl oz look like?

Illustration of a rocks glass
124 mL (4.2 fl oz) is about a rocks glass (old-fashioned glass) used for cocktails.

4.2 fl oz on the cup scale

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4.2 fl oz = 0.525 cup

How to Convert Ounce to Cup

1 ounce = 18 cups

Cup = Ounce × 18

Example: 4 15 fl oz × 18 = 0.525 cup

Reverse Conversion

To convert cups back to ounces:

  • Remember, 1 cup equals 8 ounces.
  • To convert 0.525 cup to fl oz, multiply 0.525 x 8, resulting in 4 15 fl oz.

4 15 fl oz is also equal to:

Frequently Asked Questions

How much is 4.2 ounces in cups?

4.2 ounces equals 0.525 cups. This is calculated by multiplying 4.2 by the conversion factor 0.125.

What does 4.2 ounces look like in cups?

4.2 ounces (0.525 cups) is a small cup of liquid — half a measuring cup.

How do you calculate 4.2 ounces to cups?

Multiply 4.2 by the conversion factor 0.125. The calculation is 4.2 × 0.125 = 0.525 cups. This factor is defined by international measurement standards.

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4.2 ounces = 0.525 cups
4.2 ounces = 0.525 cups — conversion chart

Nearby Conversions

0.2 ounces0.025 cups 1.2 ounces0.15 cups 2.2 ounces0.275 cups 3.2 ounces0.4 cups 5.2 ounces0.65 cups 6.2 ounces0.775 cups 7.2 ounces0.9 cups 8.2 ounces1.025 cups 9.2 ounces1.15 cups 10.2 ounces1.275 cups 11.2 ounces1.4 cups 12.2 ounces1.525 cups 13.2 ounces1.65 cups 14.2 ounces1.775 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.