Cups to Fluid ounces Converter cup → fl oz

1 cup (us) (cup) = 8 fluid ounces (fl oz). Type a value below, the conversion happens instantly, entirely on your device.

From

1 cup = 8 fl oz

Precision

1.5 cups = 12 fluid ounces

1.5 × 8 = 12

1 cup equals 8 fl oz, so multiplying by 8 converts the value. The result describes the exact same quantity, only the measuring stick changes.

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How to convert cups to fluid ounces

fluid ounces = cups × 8, multiply the cup (us) value by 8.

Example: 1.5 cup = 12 fl oz.

To convert the other way: cups = fluid ounces ÷ 8 — or use the dedicated fl oz to cup converter .

A US cup is exactly 8 US fluid ounces, so 1.5 cups is 12 fl oz. This is definitional, no rounding, which is why American recipes switch freely between the two.

Cups to Fluid ounces conversion table

Cups (cup)	Fluid ounces (fl oz)
0.1	0.8
0.25	2
0.5	4
1	8
2	16
3	24
4	32
5	40
6	48
7	56
8	64
9	72
10	80
15	120
20	160
25	200
30	240
40	320
50	400
75	600
100	800
250	2000
500	4000
1000	8000

About the units

What is a cup (us)?

A US cup is exactly 236.588 mL, 8 US fluid ounces or 16 tablespoons. It is the foundational measure of American recipes. (A metric cup, used in Australia, is 250 mL.)

What is a fluid ounce (us)?

A US fluid ounce (fl oz) is exactly 29.5735 mL, 1/8 of a US cup. Drink sizes and cosmetics are commonly labeled in fluid ounces. (The UK fluid ounce is slightly smaller: 28.41 mL.)

Frequently asked questions

How many fluid ounces are in 1 cup (us)?

1 cup (us) (cup) = 8 fluid ounces (fl oz).

What is the formula to convert cups to fluid ounces?

fluid ounces = cups × 8, multiply the cup (us) value by 8.

How do I convert cup to fl oz without a calculator?

Multiply by 8 for a close estimate. Exact factor: 1 cup = 8 fl oz.

Is this cup-to-fl oz converter accurate and private?

Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser, your input is never sent to a server, and the page keeps working offline.