Question 1

What is 4,390 ppm in PSU?

Accepted Answer

4,390 ppm = 4.412 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 4.412 PSU in ppm?

Accepted Answer

4.412 PSU = 4,390.5 ppm.

ppm	PSU
4,375 ppm	4.396
4,380 ppm	4.401
4,385 ppm	4.406
4,390	4.412
4,395 ppm	4.417
4,400 ppm	4.422
4,405 ppm	4.427

4,390 ppm to PSU

Formula