613.5 g/kg = 616.506 PSU
| g/kg | PSU |
|---|---|
| 598.5 g/kg | 601.433 |
| 603.5 g/kg | 606.457 |
| 608.5 g/kg | 611.482 |
| 613.5 | 616.506 |
| 618.5 g/kg | 621.531 |
| 623.5 g/kg | 626.555 |
| 628.5 g/kg | 631.58 |
613.5 g/kg = 616.506 PSU
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)