How many fluid ounces are in a cup?
There are 8 US fluid ounces in one US cup.
Ounces to Cups Converter
Convert US liquid volume between fluid ounces and cups.
Convert fluid ounces and cups
This converter handles volume, not ounces of weight.
About this converter
How to use Ounces to Cups Converter, plus the formulas and logic behind the results.
Tool description
US recipes use eight US fluid ounces per cup. A fluid ounce measures volume and is different from an avoirdupois ounce of mass.
How to use
- Choose the direction.
- Enter the liquid volume.
- Select Calculate.
- Read cups or US fluid ounces.
Formulas & reference
cups = US fl oz ÷ 8US fl oz = cups × 8
Quick reference
- cups = US fl oz ÷ 8
- US fl oz = cups × 8
Calculation logic
The calculator divides by eight for cups or multiplies by eight for fluid ounces.
Results use standard stated conversion factors and may be rounded for display.
Ounces to Cups Converter FAQ
Common questions about this conversion and how to interpret the result.
Are fluid ounces a weight?
No. Fluid ounces measure volume.
Does this use US or UK cups?
It uses US customary cups and US fluid ounces.
How many cups are 16 fluid ounces?
Sixteen US fluid ounces equal 2 cups.
Can I convert half a cup?
Yes. Half a cup equals 4 US fluid ounces.
Does ingredient density matter?
Not for volume-to-volume conversion; density matters only when converting to weight.