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 15 gallons into cups we have to multiply 15 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

15 gal → V_(cup)

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

V_(cup) = 15 gal × 16 cup

V_(cup) = 240 cup

The final result is:

15 gal → 240 cup

We conclude that 15 gallons is equivalent to 240 cups:

15 gallons = 240 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 0.0041666666666667 × 15 gallons.

Another way is saying that 15 gallons is equal to 1 ÷ 0.0041666666666667 cups.

Approximate result

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

15 gal ≅ 240 cup

An alternative is also that one cup is approximately zero point zero zero four times fifteen 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