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 90 cups into gallons we have to multiply 90 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

90 cup → V_(gal)

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

V_(gal) = 90 cup × 0.0625 gal

V_(gal) = 5.625 gal

The final result is:

90 cup → 5.625 gal

We conclude that 90 cups is equivalent to 5.625 gallons:

90 cups = 5.625 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 0.17777777777778 × 90 cups.

Another way is saying that 90 cups is equal to 1 ÷ 0.17777777777778 gallons.

Approximate result

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

90 cup ≅ 5.625 gal

An alternative is also that one gallon is approximately zero point one seven eight times ninety 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