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 2.5 cups into gallons we have to multiply 2.5 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

2.5 cup → V_(gal)

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

V_(gal) = 2.5 cup × 0.0625 gal

V_(gal) = 0.15625 gal

The final result is:

2.5 cup → 0.15625 gal

We conclude that 2.5 cups is equivalent to 0.15625 gallons:

2.5 cups = 0.15625 gallons

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 gallon is equal to 6.4 × 2.5 cups.

Another way is saying that 2.5 cups is equal to 1 ÷ 6.4 gallons.

Approximate result

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

2.5 cup ≅ 0.156 gal

An alternative is also that one gallon is approximately six point four times two 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