500 gallons is 8,000 cups @16 cups per gallon (US measure).
2 gal
4 gal 1 gallon = 16 cups 1 cup = 0.06 Gallon
2 cups
0.93 gal 1 gallon = 16 cups 1 cup = 0.06 Gallon
There are 32 cups in 4 gallons.
6 gal
6.25 gal
17272144 cups
5 gal 1 gallon = 16 cups 1 cup = 0.06 Gallon
0.78 gal 1 gallon = 16 cups 1 cup = 0.06 gallon
500 ml = 2.113 cups U.S.
that is 48 cups