US cups to US fluid ounces
Multiply US cups by 8 to get US fluid ounces.
1.5 cup = 12 fl oz
How to convert US cups to US fluid ounces
The US fluid ounce is a US fluid ounce, one 128th of a gallon (29.5735295625 millilitres). The US cup is a US customary cup, one sixteenth of a gallon (236.5882365 millilitres).
Worked example — 1.5 cup: 1.5 × 8 = 12 fl oz.
US cups to US fluid ounces table
| US cups | US fluid ounces |
|---|---|
| 0.25 cup | 2 fl oz |
| 0.5 cup | 4 fl oz |
| 0.75 cup | 6 fl oz |
| 1 cup | 8 fl oz |
| 1.5 cup | 12 fl oz |
| 2 cup | 16 fl oz |
| 3 cup | 24 fl oz |
| 4 cup | 32 fl oz |
| 8 cup | 64 fl oz |
Reverse and related
About US cups and US fluid ounces
US cup (cup)
1 cup = 8 fl ozDefinition. A US customary cup, one sixteenth of a gallon (236.5882365 millilitres)
History and origin
The US customary cup was standardised as a cooking measure at one sixteenth of a gallon, about 237 millilitres. It became popular through American recipe books in the nineteenth and twentieth centuries.
Current use
The cup is the dominant volume measure in US home cooking and baking; metric recipes usually give millilitres or grams instead.
Source: NIST Handbook 44, Appendix C §2 (U.S. Customary Units) and §5 (Tables of Equivalents)
US fluid ounce (fl oz)
1 fl oz = 0.125 cupDefinition. A US fluid ounce, one 128th of a gallon (29.5735295625 millilitres)
History and origin
The fluid ounce began as the volume of one ounce of wine or water and later diverged between the US and imperial systems. The US fluid ounce is one 128th of a gallon, about 29.6 millilitres.
Current use
Fluid ounces measure drink sizes and recipe liquids in the United States; the imperial fluid ounce used elsewhere is slightly smaller.
Source: NIST Handbook 44, Appendix C §2 (U.S. Customary Units) and §5 (Tables of Equivalents)
Where people use this
US cups: recipes, baking. US fluid ounces: drink sizes, recipe liquids. 1 US cup is 8 fluid ounces.
Every value is carried to full double precision; the display is rounded.
Both units are defined in NIST Handbook 44, Appendix C §2 (U.S. Customary Units) and §5 (Tables of Equivalents).
Questions people ask
How many fluid ounces in a cup?
One US cup is exactly 8 fluid ounces.
How many fl oz is 2 cups?
2 US cups is 16 fluid ounces.
How many fl oz is half a cup?
Half a US cup is 4 fluid ounces.