Question

How can I convert units of capacity

Answer 1

1 millimeter = 0.001 liter
1 centiliter = 0.01 liter
1 deciliter = 0.1 liter

1 gallon = 4 quarts 
1 gallon = 128 ounces
1 quart = 2 pints 
1 pint = 2 cups
1 cup = 8 ounces

Wish you were a little more specific on your question, but I hope I helped