A gallon(gal) is a unit of capacity and is used to measure very large volumes of liquids.
A cup(c or C) is a unit of volume measurement of volume equal to 16 tablespoons. A US cup is about 237 ml.
Formula to convert gal to C.
To convert c to gallons, we do need to know how they relate to each other.
We say that 1 US cup is equivalent to 0.0625 US gallons.
Therefore, to convert c to gal, we multiply the c by 0.0625 or divide the cups by 16.
Capacity in gal = Capacity in C x 0.0625
Convert 80 cups to gallons.
= 80 x 0.0625
= 5 gallons.