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Convert cups to fluid ounces (cup to fl oz)

Type a value in cups or in fluid ounces: the other field updates as you type. Below you will find the formula, a worked example and a cup to fl oz chart.

Updated on

1 cup = 8 fl oz

How to convert cups to fluid ounces

Formula: fl oz = cup × 8

Worked example: 2 cup → 2 × 8 = 16 fl oz

Cups to fluid ounces conversion chart

Cups (cup)Fluid ounces (fl oz)
0.25 cup2 fl oz
0.5 cup4 fl oz
0.75 cup6 fl oz
1 cup8 fl oz
1.25 cup10 fl oz
1.5 cup12 fl oz
2 cup16 fl oz
2.5 cup20 fl oz
3 cup24 fl oz
4 cup32 fl oz
5 cup40 fl oz
6 cup48 fl oz
8 cup64 fl oz
10 cup80 fl oz
12 cup96 fl oz
16 cup128 fl oz

What is a cup?

The US customary cup holds 8 fluid ounces, about 236.6 ml. Nutrition labels use a rounded 240 ml cup, and Canada and Australia use a 250 ml metric cup. In baking, measure dry ingredients level, or better, weigh them.

What is a fluid ounce?

The US fluid ounce is 1/128 of a US gallon, about 29.57 ml. It measures drinks and liquid ingredients: a soda can holds 12 fl oz. It is a volume, unlike the ounce on a scale, and slightly larger than the imperial fluid ounce.

Frequently asked questions

How many fluid ounces are in a cup?

A cup equals 8 fluid ounces. To convert any value, multiply the number of cups by 8.

How do you convert cups to fluid ounces?

Use the formula fl oz = cup × 8. Example: 2 cup → 2 × 8 = 16 fl oz.

How many cups are in a fluid ounce?

A fluid ounce equals 0.125 cups. That is the reverse conversion, from fluid ounces to cups.

Results are rounded to 6 significant digits; the conversion factors are the exact legal definitions.