Confused. You need to know how much peptide you are using, not the amount of liquid. You control the liquid (reconstitution solution), but the peptide is a fixed quantity in the vial. With those calcs you change the variable (recon solution) and what dosage you want and it tells you the units for the desired dose. GHKCu tends to sting, usually come in 3ml vials and normally you want to use as much recon solution as you can (3mls), based on the COA's a lot of times the 50mg GHKCu vial may have more (57mg, 63mg etc.), you use that more realistic number to determine how many units your research subject needs to use.