Suhail Ajmal answered There are 3 teaspoons is 1 tablespoon and 8 ounces in 1 cup that means 16 ounces of water is equal to 2 cups which is 1 pint and 32 ounces is equal to 4 cups which is 2 pints and 1 quart. So you can say that there are 2.25 cups in 18 Oz.