How many grains in 1.6 cc?

To convert cubic centimeters (cc) to grains, you need to know the density of the substance in question, as grains are a unit of weight, not volume. For example, water has a density of about 1 gram per cc, so 1.6 cc of water would weigh approximately 1.6 grams. Since there are approximately 15.432 grains in a gram, 1.6 grams would equal about 24.7 grains. However, this conversion will vary for different substances based on their densities.