487.5 g/kg = 489.889 PSU
| g/kg | PSU |
|---|---|
| 472.5 g/kg | 474.815 |
| 477.5 g/kg | 479.84 |
| 482.5 g/kg | 484.864 |
| 487.5 | 489.889 |
| 492.5 g/kg | 494.913 |
| 497.5 g/kg | 499.938 |
| 502.5 g/kg | 504.962 |
487.5 g/kg = 489.889 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)