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 666.5 gallons into cups we have to multiply 666.5 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

666.5 gal → V_(cup)

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

V_(cup) = 666.5 gal × 16 cup

V_(cup) = 10664 cup

The final result is:

666.5 gal → 10664 cup

We conclude that 666.5 gallons is equivalent to 10664 cups:

666.5 gallons = 10664 cups

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 cup is equal to 9.377344336084E-5 × 666.5 gallons.

Another way is saying that 666.5 gallons is equal to 1 ÷ 9.377344336084E-5 cups.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred sixty-six point five gallons is approximately ten thousand six hundred sixty-four cups:

666.5 gal ≅ 10664 cup

An alternative is also that one cup is approximately zero times six hundred sixty-six 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