Cups → fluid ounces

Cups to Ounces Converter

1 cup = 8 fluid ounces.

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Cups to fluid ounces chart

cupsfluid ounces
⅛ cup1 fl oz
¼ cup2 fl oz
⅓ cup2.67 fl oz (2 ⅔)
½ cup4 fl oz
⅔ cup5.33 fl oz (5 ⅓)
¾ cup6 fl oz
1 cup8 fl oz
1 ½ cup12 fl oz
2 cup16 fl oz
3 cup24 fl oz
4 cup32 fl oz

How to convert cups to fluid ounces

fluid ounces = cups × 8

US measuring cups and spoons are fixed ratios: 1 cup = 16 tablespoons = 48 teaspoons = 8 fluid ounces = 236.6 ml.

Fluid ounces or weight ounces?

Recipes use "ounces" for both. Fluid ounces measure volume: 8 fl oz = 1 cup of anything. Ounces by weight depend on the ingredient: 8 oz of flour is 1.81 cups, 8 oz of sugar is 1.13 cups. For weight, set "From" to Ounces (oz) above and pick the ingredient.

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Frequently asked questions

How many fluid ounces are in a cup?

8. 1 cup = 8 fluid ounces.

How many fluid ounces are in ⅓ cup?

2.67 fl oz.

Is a metric cup the same as a US cup?

No. A US cup is 237 ml; a metric cup (Australia, Canada, New Zealand) is 250 ml. Tablespoons differ too: 14.8 ml in the US, 15 ml metric, 20 ml in Australia.

Does it matter what I am measuring?

Not for volume to volume: a cup is 16 tablespoons of anything. It matters only when converting volume to weight (cups to grams).