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 2.5 gallons into cups we have to multiply 2.5 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

2.5 gal → V_(cup)

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

V_(cup) = 2.5 gal × 16 cup

V_(cup) = 40 cup

The final result is:

2.5 gal → 40 cup

We conclude that 2.5 gallons is equivalent to 40 cups:

2.5 gallons = 40 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.025 × 2.5 gallons.

Another way is saying that 2.5 gallons is equal to 1 ÷ 0.025 cups.

Approximate result

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

2.5 gal ≅ 40 cup

An alternative is also that one cup is approximately zero point zero two five times two point five 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