US fluid ounce to US cup Converter
Type a value — the answer appears instantly. 1 fl oz = 0.125 cup.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
0.125 US cups
= 0.0295735 L= 29.5735 ml
equals 0.125 US cupsFormula: cup = fl oz × 0.125
US fluid ounce to US cup formula
cup = fl oz × 0.125
Convert 5 US fluid ounces to US cups
- Start with 5 US fluid ounces.
- Multiply by the conversion factor: 5 × 0.125 = 0.625.
- So 5 fl oz = 0.625 cup.
US fluid ounce to US cup conversion table
| US fluid ounces (fl oz) | US cups (cup) |
|---|---|
| 0.01 fl oz | 0.00125 cup |
| 0.1 fl oz | 0.0125 cup |
| 0.25 fl oz | 0.03125 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 |
| 6 fl oz | 0.75 cup |
| 7 fl oz | 0.875 cup |
| 8 fl oz | 1 cup |
| 9 fl oz | 1.125 cup |
| 10 fl oz | 1.25 cup |
| 15 fl oz | 1.875 cup |
| 20 fl oz | 2.5 cup |
| 25 fl oz | 3.125 cup |
| 30 fl oz | 3.75 cup |
| 40 fl oz | 5 cup |
| 50 fl oz | 6.25 cup |
| 75 fl oz | 9.375 cup |
| 100 fl oz | 12.5 cup |
| 250 fl oz | 31.25 cup |
| 500 fl oz | 62.5 cup |
| 1,000 fl oz | 125 cup |
| 5,000 fl oz | 625 cup |
| 10,000 fl oz | 1,250 cup |
Unit definitions
What is a US fluid ounce?
The US fluid ounce is one 128th of a US gallon, about 29.57 millilitres. It is the customary unit for beverages and liquid packaging in the United States. It is slightly larger than the imperial (UK) fluid ounce.
What is a US cup?
The US customary cup is one sixteenth of a US gallon, about 236.59 millilitres. It is the standard volume measure in American home cooking and baking. It equals eight US fluid ounces.
Frequently asked questions
How many US cups are in one US fluid ounce?
One US fluid ounce equals 0.125 US cups (1 fl oz = 0.125 cup).
How do I convert US fluid ounces to US cups?
Multiply the value in US fluid ounces by 0.125. For example, 10 fl oz × 0.125 = 1.25 cup.
Which is bigger — a US fluid ounce or a US cup?
A US cup is bigger: one US cup contains 8 US fluid ounces.
Is this US fluid ounce to US cup converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.