Convert Cups (US) to Fluid Ounces (US)
One cup (US) equals 8 fluid ounces (us). Type any value to convert cups (us) to fluid ounces (us) instantly — with a full reference table below.
Convert Cups (US) to Fluid Ounces (US)
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How to convert Cups (US) to Fluid Ounces (US)
To convert cups (us) to fluid ounces (us), multiply by 8. One cup (US) equals 8 fl oz, and one fluid ounce (US) equals 0.125 cup.
- Take the value in cups (us) — for example 7.5 cup.
- Multiply by 8 (the number of fluid ounces (us) in one cup (US)).
- 7.5 × 8 = 60 fl oz.
Quick mental estimate: Multiply the number of cups (us) by 8 — that is exact.
Cups (US) to Fluid Ounces (US) conversion table
| Cups (US) | Fluid Ounces (US) |
|---|---|
| 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 |
| 8 cup | 64 fl oz |
| 10 cup | 80 fl oz |
| 12 cup | 96 fl oz |
| 16 cup | 128 fl oz |
| 20 cup | 160 fl oz |
| 24 cup | 192 fl oz |
| 32 cup | 256 fl oz |
| 50 cup | 400 fl oz |
| 100 cup | 800 fl oz |
| Fluid Ounces (US) | Cups (US) |
|---|---|
| 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 |
| 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 |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
About converting Cups (US) to Fluid Ounces (US)
Cups (US) (cup) and Fluid Ounces (US) (fl oz) are both units of volume. The exact factor is 1 cup = 8 fl oz, so multiply by 8 to go from cups (us) to fluid ounces (us) (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Fluid Ounces (US) to Cups (US) converter, or the full unit converter for every unit at once.
Real-world volume in cups (us) and fluid ounces (us)
| Example | Cups (US) | Fluid Ounces (US) |
|---|---|---|
| A medicine teaspoon dose | 0.0211338 cup | 0.16907 fl oz |
| A US soda can (12 fl oz) | 1.5 cup | 12 fl oz |
| A wine bottle | 3.170065 cup | 25.36052 fl oz |
| A US gallon of milk | 16 cup | 128 fl oz |
| A typical car fuel tank | ≈ 211.3376 cup | ≈ 1,690.701 fl oz |
| A typical bathtub | ≈ 634.0129 cup | ≈ 5,072.103 fl oz |
“≈” marks typical values; the rest are defined or measured figures.
The units
The US customary cup: 1/16 US gallon, 236.5882365 mL. US nutrition labels use 240 mL; metric cups are 250 mL.
Used for: US recipes.
The US fluid ounce: 1/128 US gallon, 29.5735295625 mL.
Used for: US drink and cosmetics labels.
US customary volumes are exact by definition: the US gallon is 231 cubic inches, which is exactly 3.785411784 litres.