Question 1

What is 421 g/kg in PSU?

Accepted Answer

421 g/kg = 423.063 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 423.063 PSU in g/kg?

Accepted Answer

423.063 PSU = 421.0001 g/kg.

g/kg	PSU
406 g/kg	407.989
411 g/kg	413.014
416 g/kg	418.038
421	423.063
426 g/kg	428.087
431 g/kg	433.112
436 g/kg	438.136

421 g/kg to PSU

Formula