266.5 g/kg = 267.806 PSU
| g/kg | PSU |
|---|---|
| 251.5 g/kg | 252.732 |
| 256.5 g/kg | 257.757 |
| 261.5 g/kg | 262.781 |
| 266.5 | 267.806 |
| 271.5 g/kg | 272.83 |
| 276.5 g/kg | 277.855 |
| 281.5 g/kg | 282.879 |
266.5 g/kg = 267.806 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)