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 338.9 cups into gallons we have to multiply 338.9 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

338.9 cup → V_(gal)

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

V_(gal) = 338.9 cup × 0.0625 gal

V_(gal) = 21.18125 gal

The final result is:

338.9 cup → 21.18125 gal

We conclude that 338.9 cups is equivalent to 21.18125 gallons:

338.9 cups = 21.18125 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.047211566833874 × 338.9 cups.

Another way is saying that 338.9 cups is equal to 1 ÷ 0.047211566833874 gallons.

Approximate result

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

338.9 cup ≅ 21.181 gal

An alternative is also that one gallon is approximately zero point zero four seven times three hundred thirty-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