Question 1

What is 55 ppm in PSU?

Accepted Answer

55 ppm = 0.055 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 0.055 PSU in ppm?

Accepted Answer

0.055 PSU = 54.7 ppm.

ppm	PSU
40 ppm	0.04
45 ppm	0.045
50 ppm	0.05
55 ppm	0.055
60 ppm	0.06
65 ppm	0.065
70 ppm	0.07

55 ppm to PSU

Formula