Conversion formula

The conversion factor from gallons to cups is 16, which means that 1 gallon is equal to 16 cups:

1 gal = 16 cup

To convert 638 gallons into cups we have to multiply 638 by the conversion factor in order to get the volume amount from gallons to cups. We can also form a simple proportion to calculate the result:

1 gal → 16 cup

638 gal → V_(cup)

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

V_(cup) = 638 gal × 16 cup

V_(cup) = 10208 cup

The final result is:

638 gal → 10208 cup

We conclude that 638 gallons is equivalent to 10208 cups:

638 gallons = 10208 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 9.7962382445141E-5 × 638 gallons.

Another way is saying that 638 gallons is equal to 1 ÷ 9.7962382445141E-5 cups.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred thirty-eight gallons is approximately ten thousand two hundred eight cups:

638 gal ≅ 10208 cup

An alternative is also that one cup is approximately zero times six hundred thirty-eight gallons.

Conversion table

gallons to cups chart

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