405 g/kg to PSU

405 g/kg = 406.984 PSU

g/kgPSU
390 g/kg391.911
395 g/kg396.935
400 g/kg401.96
405406.984
410 g/kg412.009
415 g/kg417.033
420 g/kg422.058

405 g/kg = 406.984 PSU

Formula

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