Question 1

What is 640 g/kg in PSU?

Accepted Answer

640 g/kg = 643.136 PSU. Use the converter on this page to convert to other salinity / tds units instantly.

Question 2

How do you convert g/kg to PSU?

Accepted Answer

Formula: 1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation). Multiply your g/kg value by the appropriate factor to get PSU, or use the interactive converter above.

Question 3

What is 643.136 PSU in g/kg?

Accepted Answer

643.136 PSU = 640 g/kg.

g/kg	PSU
625 g/kg	628.062
630 g/kg	633.087
635 g/kg	638.111
640	643.136
645 g/kg	648.16
650 g/kg	653.185
655 g/kg	658.209

640 g/kg to PSU

Formula