Equivalent volume
Your value in fluid ounces, cups, and millilitres.
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Volume
oz to Cups Converter
Convert fluid ounces (fl oz) to US cups instantly — there are 8 fl oz in a cup — with a full equivalents table and comparison chart.
Result
2 cup
How it works
A US cup is defined as 8 fluid ounces, so converting is a simple divide-by-8. This is the fluid ounce (volume), not the weight ounce.
cups = fluid ounces ÷ 8
1 cup = 8 fl oz = 236.588 mL
1 cup = 8 fl oz = 236.588 mL
Worked example
16 fluid ounces equals 16 ÷ 8 = 2 cups.
Frequently asked questions
How many ounces are in a cup?
8 US fluid ounces.
How many cups is 16 oz?
2 cups.