456.5 g/kg = 458.737 PSU
| g/kg | PSU |
|---|---|
| 441.5 g/kg | 443.663 |
| 446.5 g/kg | 448.688 |
| 451.5 g/kg | 453.712 |
| 456.5 | 458.737 |
| 461.5 g/kg | 463.761 |
| 466.5 g/kg | 468.786 |
| 471.5 g/kg | 473.81 |
456.5 g/kg = 458.737 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)