Convert Fluid Ounces (US) to Cups (US)
One fluid ounce (US) equals 0.125 cups (us). Type any value to convert fluid ounces (us) to cups (us) instantly — with a full reference table below.
Convert Fluid Ounces (US) to Cups (US)
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How to convert Fluid Ounces (US) to Cups (US)
To convert fluid ounces (us) to cups (us), multiply by 0.125. One fluid ounce (US) equals 0.125 cup, and one cup (US) equals 8 fl oz.
- Take the value in fluid ounces (us) — for example 7.5 fl oz.
- Multiply by 0.125 (the number of cups (us) in one fluid ounce (US)).
- 7.5 × 0.125 = 0.9375 cup.
Quick mental estimate: Divide the number of fluid ounces (us) by 8 — that is exact.
Fluid Ounces (US) to Cups (US) conversion table
| 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 |
| 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 |
About converting Fluid Ounces (US) to Cups (US)
Fluid Ounces (US) (fl oz) and Cups (US) (cup) are both units of volume. The exact factor is 1 fl oz = 0.125 cup, so multiply by 0.125 to go from fluid ounces (us) to cups (us) (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Cups (US) to Fluid Ounces (US) converter, or the full unit converter for every unit at once.
Real-world volume in fluid ounces (us) and cups (us)
| Example | Fluid Ounces (US) | Cups (US) |
|---|---|---|
| A medicine teaspoon dose | 0.16907 fl oz | 0.0211338 cup |
| A US soda can (12 fl oz) | 12 fl oz | 1.5 cup |
| A wine bottle | 25.36052 fl oz | 3.170065 cup |
| A US gallon of milk | 128 fl oz | 16 cup |
| A typical car fuel tank | ≈ 1,690.701 fl oz | ≈ 211.3376 cup |
| A typical bathtub | ≈ 5,072.103 fl oz | ≈ 634.0129 cup |
“≈” marks typical values; the rest are defined or measured figures.
The units
The US fluid ounce: 1/128 US gallon, 29.5735295625 mL.
Used for: US drink and cosmetics labels.
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.
US customary volumes are exact by definition: the US gallon is 231 cubic inches, which is exactly 3.785411784 litres.