LazyTools

🔒 Everything on LazyTools runs in your browser — your data is never uploaded to any server. How it works

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.

1 cup = 8 fl oz

1 cups = 8 fluid ounces

1 × 8 = 8

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.

Rate this tool:
Anonymous — no tracking

How to convert cups to fluid ounces

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

Example: 10 cup = 80 fl oz.

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

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.

Related conversions