Conversion formula

The conversion factor from cups to gallons is 0.0625, which means that 1 cup is equal to 0.0625 gallons:

1 cup = 0.0625 gal

To convert 328.9 cups into gallons we have to multiply 328.9 by the conversion factor in order to get the volume amount from cups to gallons. We can also form a simple proportion to calculate the result:

1 cup → 0.0625 gal

328.9 cup → V_(gal)

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

V_(gal) = 328.9 cup × 0.0625 gal

V_(gal) = 20.55625 gal

The final result is:

328.9 cup → 20.55625 gal

We conclude that 328.9 cups is equivalent to 20.55625 gallons:

328.9 cups = 20.55625 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.048647005168744 × 328.9 cups.

Another way is saying that 328.9 cups is equal to 1 ÷ 0.048647005168744 gallons.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred twenty-eight point nine cups is approximately twenty point five five six gallons:

328.9 cup ≅ 20.556 gal

An alternative is also that one gallon is approximately zero point zero four nine times three hundred twenty-eight point nine cups.

Conversion table

cups to gallons chart

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