821 g/kg = 825.023 PSU
| g/kg | PSU |
|---|---|
| 806 g/kg | 809.949 |
| 811 g/kg | 814.974 |
| 816 g/kg | 819.998 |
| 821 g/kg | 825.023 |
| 826 g/kg | 830.047 |
| 831 g/kg | 835.072 |
| 836 g/kg | 840.096 |
821 g/kg = 825.023 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)