591 g/kg to PSU

591 g/kg = 593.896 PSU

g/kgPSU
576 g/kg578.822
581 g/kg583.847
586 g/kg588.871
591593.896
596 g/kg598.92
601 g/kg603.945
606 g/kg608.969

591 g/kg = 593.896 PSU

Formula

1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)