127.5 g/kg = 128.125 PSU
| g/kg | PSU |
|---|---|
| 112.5 g/kg | 113.051 |
| 117.5 g/kg | 118.076 |
| 122.5 g/kg | 123.1 |
| 127.5 | 128.125 |
| 132.5 g/kg | 133.149 |
| 137.5 g/kg | 138.174 |
| 142.5 g/kg | 143.198 |
127.5 g/kg = 128.125 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)