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 664.5 cups into gallons we have to multiply 664.5 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

664.5 cup → V_(gal)

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

V_(gal) = 664.5 cup × 0.0625 gal

V_(gal) = 41.53125 gal

The final result is:

664.5 cup → 41.53125 gal

We conclude that 664.5 cups is equivalent to 41.53125 gallons:

664.5 cups = 41.53125 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.024078254326561 × 664.5 cups.

Another way is saying that 664.5 cups is equal to 1 ÷ 0.024078254326561 gallons.

Approximate result

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

664.5 cup ≅ 41.531 gal

An alternative is also that one gallon is approximately zero point zero two four times six hundred sixty-four point five 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