120.5 g/kg = 121.09 PSU
| g/kg | PSU |
|---|---|
| 105.5 g/kg | 106.017 |
| 110.5 g/kg | 111.041 |
| 115.5 g/kg | 116.066 |
| 120.5 | 121.09 |
| 125.5 g/kg | 126.115 |
| 130.5 g/kg | 131.139 |
| 135.5 g/kg | 136.164 |
120.5 g/kg = 121.09 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)