391 g/kg to PSU

391 g/kg = 392.916 PSU

g/kgPSU
376 g/kg377.842
381 g/kg382.867
386 g/kg387.891
391392.916
396 g/kg397.94
401 g/kg402.965
406 g/kg407.989

391 g/kg = 392.916 PSU

Formula

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