4,350 ppm to PSU

4,350 ppm = 4.371 PSU

ppmPSU
4,335 ppm4.356
4,340 ppm4.361
4,345 ppm4.366
4,3504.371
4,355 ppm4.376
4,360 ppm4.381
4,365 ppm4.386

4350 ppm = 4.371 PSU

Formula

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