Cups (US) to Fluid ounces (US) Converter
Convert cups (us) to fluid ounces (us) instantly. Exact factor: 1 cup = 8 fl oz.
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Convert cups (us) to fluid ounces (us)
The exact conversion factor is 1 cup = 8 fl oz. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the cups (us) value by 8 to get fluid ounces (us).
Worked example
- Take 1 cup
- multiply by 8
- the result is 8 fl oz
How to use it
- Enter your cups (us)
- Read the fluid ounces (us) result
- Check the factor line to verify by hand
Frequently asked questions
How many fluid ounces (us) are in one cups (us)?
Exactly 8 fl oz, by the SI/NIST definition.
How do I convert fluid ounces (us) back to cups (us)?
Divide by 8 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.