Conversion formula

The conversion factor from fluid ounces to quarts is 0.03125, which means that 1 fluid ounce is equal to 0.03125 quarts:

1 fl oz = 0.03125 qt

To convert 21 fluid ounces into quarts we have to multiply 21 by the conversion factor in order to get the volume amount from fluid ounces to quarts. We can also form a simple proportion to calculate the result:

1 fl oz → 0.03125 qt

21 fl oz → V_(qt)

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

V_(qt) = 21 fl oz × 0.03125 qt

V_(qt) = 0.65625 qt

The final result is:

21 fl oz → 0.65625 qt

We conclude that 21 fluid ounces is equivalent to 0.65625 quarts:

21 fluid ounces = 0.65625 quarts

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 quart is equal to 1.5238095238095 × 21 fluid ounces.

Another way is saying that 21 fluid ounces is equal to 1 ÷ 1.5238095238095 quarts.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one fluid ounces is approximately zero point six five six quarts:

21 fl oz ≅ 0.656 qt

An alternative is also that one quart is approximately one point five two four times twenty-one fluid ounces.

Conversion table

fluid ounces to quarts chart

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