4,245 ppm to PSU

4,245 ppm = 4.266 PSU

ppmPSU
4,230 ppm4.251
4,235 ppm4.256
4,240 ppm4.261
4,2454.266
4,250 ppm4.271
4,255 ppm4.276
4,260 ppm4.281

4245 ppm = 4.266 PSU

Formula

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