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 138 cups into gallons we have to multiply 138 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

138 cup → V_(gal)

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

V_(gal) = 138 cup × 0.0625 gal

V_(gal) = 8.625 gal

The final result is:

138 cup → 8.625 gal

We conclude that 138 cups is equivalent to 8.625 gallons:

138 cups = 8.625 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.11594202898551 × 138 cups.

Another way is saying that 138 cups is equal to 1 ÷ 0.11594202898551 gallons.

Approximate result

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

138 cup ≅ 8.625 gal

An alternative is also that one gallon is approximately zero point one one six times one hundred thirty-eight 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