Fluid Ounces to Cups
Type fluid ounces (fl oz), see US cups.
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How to convert fluid ounces to cups
To change fluid ounces into cups, divide by 8.
cups = fluid ounces ÷ 8
Going the other way: fluid ounces = cups × 8
1 US fluid ounce = 0.125 cups. This factor is the exact definition of the unit, not a rounded estimate.
Worked example
You have 12 fluid ounces. Divide by 8: 12 ÷ 8 = 1.5 cup .
Fluid ounces to cups conversion table
| Fluid ounces (fl oz) | Cups (cup) |
|---|---|
| 1 fl oz | 0.125 cup |
| 2 fl oz | 0.25 cup |
| 3 fl oz | 0.375 cup |
| 4 fl oz | 0.5 cup |
| 6 fl oz | 0.75 cup |
| 8 fl oz | 1 cup |
| 10 fl oz | 1.25 cup |
| 12 fl oz | 1.5 cup |
| 16 fl oz | 2 cup |
| 20 fl oz | 2.5 cup |
| 24 fl oz | 3 cup |
| 32 fl oz | 4 cup |
| 48 fl oz | 6 cup |
| 64 fl oz | 8 cup |
Fluid ounces, not weight ounces
This page converts fluid ounces — a measure of how much liquid fits in the cup. 8 US fluid ounces fill exactly 1 US cup, every time.
Weight ounces are different. "8 oz of flour" is a weight, and how many cups that fills depends on the ingredient, because flour, sugar and water all have different densities. There is no single fixed number for weight ounces to cups.
If your recipe measures liquid (water, milk, oil, juice), this page is the right one.
Frequently asked questions
How many fluid ounces are in a cup?
1 US cup is exactly 8 fl oz.
How many ounces are in half a cup?
Half a cup is 4 fl oz.
Are dry and liquid measuring cups the same?
For US recipes, a standard cup measures 8 fl oz either way — the difference that matters is fluid ounces (volume) versus weight ounces, covered above.
Is 8 oz always equal to 1 cup?
Only for fluid ounces. "8 oz" of a solid ingredient is a weight, and how many cups that fills depends on the ingredient — see the note above.
Related converters
- Milliliters to Ounces mL → fl oz
- Quarts to Gallons qt → gal
- Liters to Gallons L → gal
- All volume converters How much liquid fits in something — milliliters, cups, quarts and gallons.
Every factor on this page is listed in our conversion methodology.