In the title compound, C16H34N42+·2Cl−·3H2O, the two protonated N atoms in the macrocyclic ring of the dication are located at diagonally opposite positions. There are two intramolecular N—H...N hydrogen bonds in the cation. The crystal structure features O—H...Cl, O—H...O, C—H...Cl and N—H...Cl hydrogen bonds.