Convert US cups to Fluid Ounce (US)
Americas · Cooking Measures · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
Quick answer
1 US cup = 8.00001 Fluid Ounce (US)
1 US cup = 8.00001 Fluid Ounce (US). Fluid Ounce (US) is a traditional volume unit from Americas.
Convert any amount
US cups to Fluid Ounce (US) table
| US cups | Fluid Ounce (US) |
|---|---|
| 0.25 US cups | 2 Fluid Ounce (US) |
| 0.5 US cups | 4 Fluid Ounce (US) |
| 1 US cup | 8.00001 Fluid Ounce (US) |
| 2 US cups | 16 Fluid Ounce (US) |
| 3 US cups | 24 Fluid Ounce (US) |
| 4 US cups | 32 Fluid Ounce (US) |
| 5 US cups | 40 Fluid Ounce (US) |
| 10 US cups | 80.0001 Fluid Ounce (US) |
| 20 US cups | 160 Fluid Ounce (US) |
| 25 US cups | 200 Fluid Ounce (US) |
| 50 US cups | 400 Fluid Ounce (US) |
| 100 US cups | 800.001 Fluid Ounce (US) |
About the Fluid Ounce (US)
US fl oz = 29.57ml.
- Symbol
- fl oz
- Value in SI
- 1 Fluid Ounce (US) = 0.0295735 litre
- Typical use
- cooking
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Frequently asked
How many Fluid Ounce (US) are in a US cup?
1 US cup = 8.00001 Fluid Ounce (US). Multiply the number of US cups by 8.000008 to get Fluid Ounce (US).
What is Fluid Ounce (US) used for?
US fl oz = 29.57ml. It is classified as active and dates from the modern period.
Is the Fluid Ounce (US) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Fluid Ounce (US) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert US cups to Fluid Ounce (US). UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/us-cup-to-fl-oz-us
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