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 18 gallons into cups we have to multiply 18 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

18 gal → V_(cup)

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

V_(cup) = 18 gal × 16 cup

V_(cup) = 288 cup

The final result is:

18 gal → 288 cup

We conclude that 18 gallons is equivalent to 288 cups:

18 gallons = 288 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.0034722222222222 × 18 gallons.

Another way is saying that 18 gallons is equal to 1 ÷ 0.0034722222222222 cups.

Approximate result

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

18 gal ≅ 288 cup

An alternative is also that one cup is approximately zero point zero zero three times eighteen 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