381.5 g/kg = 383.369 PSU
| g/kg | PSU |
|---|---|
| 366.5 g/kg | 368.296 |
| 371.5 g/kg | 373.32 |
| 376.5 g/kg | 378.345 |
| 381.5 | 383.369 |
| 386.5 g/kg | 388.394 |
| 391.5 g/kg | 393.418 |
| 396.5 g/kg | 398.443 |
381.5 g/kg = 383.369 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)