Conversion formula

The conversion factor from fluid ounces to cups is 0.125, which means that 1 fluid ounce is equal to 0.125 cups:

1 fl oz = 0.125 cup

To convert 639 fluid ounces into cups we have to multiply 639 by the conversion factor in order to get the volume amount from fluid ounces to cups. We can also form a simple proportion to calculate the result:

1 fl oz → 0.125 cup

639 fl oz → V_(cup)

Solve the above proportion to obtain the volume V in cups:

V_(cup) = 639 fl oz × 0.125 cup

V_(cup) = 79.875 cup

The final result is:

639 fl oz → 79.875 cup

We conclude that 639 fluid ounces is equivalent to 79.875 cups:

639 fluid ounces = 79.875 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.012519561815336 × 639 fluid ounces.

Another way is saying that 639 fluid ounces is equal to 1 ÷ 0.012519561815336 cups.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred thirty-nine fluid ounces is approximately seventy-nine point eight seven five cups:

639 fl oz ≅ 79.875 cup

An alternative is also that one cup is approximately zero point zero one three times six hundred thirty-nine fluid ounces.

Conversion table

fluid ounces to cups chart

For quick reference purposes, below is the conversion table you can use to convert from fluid ounces to cups