Question 1

What is 4,975 ppm in PSU?

Accepted Answer

4,975 ppm = 4.999 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 4.999 PSU in ppm?

Accepted Answer

4.999 PSU = 4,974.6 ppm.

ppm	PSU
4,960 ppm	4.984
4,965 ppm	4.989
4,970 ppm	4.994
4,975	4.999
4,980 ppm	5.004
4,985 ppm	5.009
4,990 ppm	5.014

4,975 ppm to PSU

Formula