Question 1

What is 4,180 ppm in PSU?

Accepted Answer

4,180 ppm = 4.2 PSU. Use the converter on this page to convert to other salinity / tds units instantly.

Question 2

How do you convert ppm 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 ppm value by the appropriate factor to get PSU, or use the interactive converter above.

Question 3

What is 4.2 PSU in ppm?

Accepted Answer

4.2 PSU = 4,179.5 ppm.

ppm	PSU
4,165 ppm	4.185
4,170 ppm	4.19
4,175 ppm	4.195
4,180	4.2
4,185 ppm	4.206
4,190 ppm	4.211
4,195 ppm	4.216

4,180 ppm to PSU

Formula