US cup to US fluid ounce Converter
Type a value — the answer appears instantly. 1 cup = 8 fl oz.
Reviewed by the OmniCalc teamMethod verified 2026-07-01
8 US fluid ounces
= 0.236588 L= 236.588 ml
equals 8 US fluid ouncesFormula: fl oz = cup × 8
US cup to US fluid ounce formula
fl oz = cup × 8
Convert 5 US cups to US fluid ounces
- Start with 5 US cups.
- Multiply by the conversion factor: 5 × 8 = 40.
- So 5 cup = 40 fl oz.
US cup to US fluid ounce conversion table
| US cups (cup) | US fluid ounces (fl oz) |
|---|---|
| 0.01 cup | 0.08 fl oz |
| 0.1 cup | 0.8 fl oz |
| 0.25 cup | 2 fl oz |
| 0.5 cup | 4 fl oz |
| 1 cup | 8 fl oz |
| 2 cup | 16 fl oz |
| 3 cup | 24 fl oz |
| 4 cup | 32 fl oz |
| 5 cup | 40 fl oz |
| 6 cup | 48 fl oz |
| 7 cup | 56 fl oz |
| 8 cup | 64 fl oz |
| 9 cup | 72 fl oz |
| 10 cup | 80 fl oz |
| 15 cup | 120 fl oz |
| 20 cup | 160 fl oz |
| 25 cup | 200 fl oz |
| 30 cup | 240 fl oz |
| 40 cup | 320 fl oz |
| 50 cup | 400 fl oz |
| 75 cup | 600 fl oz |
| 100 cup | 800 fl oz |
| 250 cup | 2,000 fl oz |
| 500 cup | 4,000 fl oz |
| 1,000 cup | 8,000 fl oz |
| 5,000 cup | 40,000 fl oz |
| 10,000 cup | 80,000 fl oz |
Unit definitions
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.
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.
Frequently asked questions
How many US fluid ounces are in one US cup?
One US cup equals 8 US fluid ounces (1 cup = 8 fl oz).
How do I convert US cups to US fluid ounces?
Multiply the value in US cups by 8. For example, 10 cup × 8 = 80 fl oz.
Which is bigger — a US cup or a US fluid ounce?
A US cup is bigger: one US cup contains 8 US fluid ounces.
Is this US cup to US fluid ounce 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.