Cups (US) to Fluid Ounces (US)

Convert cups to fl oz instantly — formula, worked examples and a conversion table of common values.

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About the Cups (US) to Fluid Ounces (US)

Convert cups (us) (cups) to fluid ounces (us) (fl oz). Enter a value on either side and the other updates instantly — nothing is sent to a server.

One US cup equals 8 fl oz. The table below lists the values people look up most often, and each one links to a page with the worked calculation.

fl oz = cups × 8

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

1 US cup = 8 fl oz.

What is 10 cups in fluid ounces (us)?

10 cups = 80 fl oz.

What is 100 cups in fluid ounces (us)?

100 cups = 800 fl oz.

How do I convert cups (us) to fluid ounces (us)?

Use the formula fl oz = cups × 8. Or type any value into the converter above — it works in both directions.