How to convert fluid ounces to cups
To convert fluid ounces to cups, multiply by 0.125. Volume conversions help with recipes, fuel, beverages, aquariums and laboratory work. US customary units are used here.
Fluid Ounce to Cup conversion table
| Fluid Ounce (fl oz) | Cup (cup) |
|---|---|
| 0.1 fl oz | 0.0125 cup |
| 0.5 fl oz | 0.0625 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 |
| 5 fl oz | 0.625 cup |
| 10 fl oz | 1.25 cup |
| 20 fl oz | 2.5 cup |
| 25 fl oz | 3.125 cup |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
| 500 fl oz | 62.5 cup |
| 1,000 fl oz | 125 cup |
About the units
Fluid Ounce (fl oz)
A US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 mL.
Cup (cup)
A US customary cup is 8 US fluid ounces, about 236.59 mL (nutrition labels round to 240 mL).
How to use this converter
- Type the number of fluid ounces (fl oz) in the input box.
- The result in cups appears instantly — no button needed.
- See the same value in every other volume unit just below.
- Use “Swap units” to convert cups back to fluid ounces.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many cups are in one fluid ounce?
One fluid ounce equals 0.125 cups. 0.125 is the exact factor used by this converter.
How do I convert fluid ounces to cups?
Multiply the value in fluid ounces by 0.125. To go the other way, multiply cups by 8.
What is 10 fl oz in cup?
10 fl oz = 1.25 cup. Also, 5 fl oz = 0.625 cup and 100 fl oz = 12.5 cup.
What is the difference between a fluid ounce and a cup?
A US fluid ounce is 1/128 of a US gallon, exactly 29.5735295625 mL. A US customary cup is 8 US fluid ounces, about 236.59 mL (nutrition labels round to 240 mL).
Is this tool free and private?
Yes — the Fluid Ounce to Cup is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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