255.5 g/kg = 256.752 PSU
| g/kg | PSU |
|---|---|
| 240.5 g/kg | 241.678 |
| 245.5 g/kg | 246.703 |
| 250.5 g/kg | 251.727 |
| 255.5 | 256.752 |
| 260.5 g/kg | 261.776 |
| 265.5 g/kg | 266.801 |
| 270.5 g/kg | 271.825 |
255.5 g/kg = 256.752 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)