8 US fluid ounces to US cups
1.000 cup
8 fl oz = 1.000 cup.
US cups
1.000cup
8 fl oz = 1.000 cup
In short
How many US cups is 8 US fluid ounces?
8 fl oz = 1.000 cup. 1 US fluid ounce = 0.125000 US cups, so the working is 8 × 0.125000 = 1.000.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 US fluid ounce = 0.125000 US cups 8 × 0.125000 = 1.000
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (cup) | Off by |
|---|---|---|
| Whole number | 1 | exact |
| 1 decimal | 1.0 | exact |
| 2 decimals | 1.00 | exact |
Round trip: take 1.000 cup back the other way and you land on 8.0000 fl oz — a drift of 0.0000 fl oz. That gap is the rounding, not the conversion.
What 8 fl oz looks like
8 fl oz
Eight fluid ounces is one US cup — the cup is defined as this quantity, not measured.
Frequently asked questions
What is 8 US fluid ounces in US cups?
8 US fluid ounces is 1.000 US cups. 1 US fluid ounce = 0.125000 US cups, so the working is 8 × 0.125000 = 1.000.
How accurate is 1.000 cup?
Rounding to 1.000 cup and converting straight back gives 8.0000 fl oz, a drift of 0.0000 fl oz from the 8 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
Any value at all
Ounces to Cups Converter
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