1 Ounce to Cups

1 fl oz = 0.125 cup

Calculation: cup = 1 fl oz × 0.125 = 0.125 cup

Ounce to Cup Converter

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How much is 1 fl oz?

30 mL (1.0 fl oz) is about one US fluid ounce (29.6 mL), about two tablespoons.

What does 1 fl oz look like?

Illustration of a small measuring cup
30 mL (1.0 fl oz) is about one US fluid ounce (29.6 mL), about two tablespoons.

1 fl oz on the cup scale

fl oz00.511.52cup00.050.10.150.20.25

1 fl oz = 0.125 cup

Did you know? One fluid ounce (US) is 30 mL.

1 US fl oz equals 29.57 mL. The Imperial (UK) fluid ounce is slightly smaller at 28.41 mL.

How to Convert Ounce to Cup

1 ounce = 18 cups

Cup = Ounce × 18

Example: 1 fl oz × 18 = 18 cup

Reverse Conversion

To convert cups back to ounces:

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

1 fl oz is also equal to:

Frequently Asked Questions

How much is 1 ounce in cups?

1 ounce equals 0.125 cups. This is calculated by multiplying 1 by the conversion factor 0.125.

What does 1 ounce look like in cups?

1 ounce (0.125 cups) is a shot glass or a few tablespoons.

How do you calculate 1 ounce to cups?

Multiply 1 by the conversion factor 0.125. The calculation is 1 × 0.125 = 0.125 cups. This factor is defined by international measurement standards.

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1 ounce = 0.125 cups
1 ounce = 0.125 cups — conversion chart

Nearby Conversions

2 ounces0.25 cups 3 ounces0.375 cups 4 ounces0.5 cups 5 ounces0.625 cups 6 ounces0.75 cups 7 ounces0.875 cups 8 ounces1 cup 9 ounces1.125 cups 10 ounces1.25 cups 11 ounces1.375 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.