20.5 g/kg to PSU

20.5 g/kg = 20.6 PSU

g/kgPSU
14.5 g/kg14.571
16.5 g/kg16.581
18.5 g/kg18.591
20.520.6
22.5 g/kg22.61
24.5 g/kg24.62
26.5 g/kg26.63

20.5 g/kg = 20.6 PSU

Formula

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