Cups to Fluid Ounces Converter
Convert cups to US fluid ounces instantly. One cup equals exactly 8 US fluid ounces. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert cups to US fluid ounces
Worked example: convert 120 cups to US fluid ounces. Using US fluid ounces ← cups × 8, we get 120 × 8 = 960 fl oz. To check the result, convert back: 960 fl oz ÷ 8 = 120 cup.
Cups to US fluid ounces chart
| Cups (cup) | Us fluid ounces (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 |
| 8 cup | 64 fl oz |
| 10 cup | 80 fl oz |
| 12 cup | 96 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 |
| 150 cup | 1,200 fl oz |
| 200 cup | 1,600 fl oz |
| 250 cup | 2,000 fl oz |
| 500 cup | 4,000 fl oz |
| 1,000 cup | 8,000 fl oz |
Us fluid ounces to cups (reverse)
| Us fluid ounces (fl oz) | Cups (cup) |
|---|---|
| 1 fl oz | 0.125 cup |
| 2 fl oz | 0.25 cup |
| 5 fl oz | 0.625 cup |
| 10 fl oz | 1.25 cup |
| 20 fl oz | 2.5 cup |
| 50 fl oz | 6.25 cup |
| 100 fl oz | 12.5 cup |
| 250 fl oz | 31.25 cup |
| 500 fl oz | 62.5 cup |
| 1,000 fl oz | 125 cup |
About the cup and the US fluid ounce
The US customary cup is 236.588 milliliters, or 8 US fluid ounces. The US nutrition-label cup is 240 ml and the metric cup used in Australia and New Zealand is 250 ml. Recipes found online usually mean the US cup.
The US fluid ounce is 29.574 milliliters and one eighth of a cup. The UK imperial fluid ounce is slightly smaller at 28.413 ml, so US and UK drink labels differ by about 4%.
One cup equals 8 US fluid ounces, which makes the cup the larger unit of the two.
Everyday sizes in cups and US fluid ounces
| Everyday example (approximate) | In cups | In US fluid ounces |
|---|---|---|
| A shot glass | 0.18598 cup | 1.4878 fl oz |
| A can of soda | 1.5005 cup | 12.004 fl oz |
| A bottle of wine | 3.1701 cup | 25.361 fl oz |
| A large water bottle | 4.2268 cup | 33.814 fl oz |
| A 2-liter soft drink bottle | 8.4535 cup | 67.628 fl oz |
| A bucket | 42.268 cup | 338.14 fl oz |
Cups to US fluid ounces FAQ
How many US fluid ounces are in one cup?
One cup equals exactly 8 US fluid ounces. In the other direction, one US fluid ounce equals 0.125 cups.
How do I convert cups to US fluid ounces without a calculator?
convert 120 cups to US fluid ounces. Using US fluid ounces ← cups × 8, we get 120 × 8 = 960 fl oz. To check the result, convert back: 960 fl oz ÷ 8 = 120 cup. For a quick estimate, round the factor to 8. Then 120 cup is about 960 fl oz, compared with the exact 960 fl oz (an error of 0%). That is close enough for planning, but use the calculator above when the number matters.
What is a bucket in US fluid ounces?
A bucket is about 42.268 cups, which is 338.14 US fluid ounces. Treat that as an approximate everyday figure rather than an official measurement.
Are the cups and US fluid ounces the same in every country?
The US customary cup is 236.588 ml, but a metric cup is 250 ml and a US legal (nutrition label) cup is 240 ml, so check where a recipe comes from. The US fluid ounce is 29.5735 ml; the UK imperial fluid ounce is 28.4131 ml.