90.5 g/kg = 90.943 PSU
| g/kg | PSU |
|---|---|
| 75.5 g/kg | 75.87 |
| 80.5 g/kg | 80.894 |
| 85.5 g/kg | 85.919 |
| 90.5 | 90.943 |
| 95.5 g/kg | 95.968 |
| 100.5 g/kg | 100.992 |
| 105.5 g/kg | 106.017 |
90.5 g/kg = 90.943 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)