402.5 g/kg = 404.472 PSU
| g/kg | PSU |
|---|---|
| 387.5 g/kg | 389.399 |
| 392.5 g/kg | 394.423 |
| 397.5 g/kg | 399.448 |
| 402.5 | 404.472 |
| 407.5 g/kg | 409.497 |
| 412.5 g/kg | 414.521 |
| 417.5 g/kg | 419.546 |
402.5 g/kg = 404.472 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)