Question 1

What is 1,550 ppm in PSU?

Accepted Answer

1,550 ppm = 1.558 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 1.558 PSU in ppm?

Accepted Answer

1.558 PSU = 1,550.4 ppm.

ppm	PSU
1,535 ppm	1.543
1,540 ppm	1.548
1,545 ppm	1.553
1,550	1.558
1,555 ppm	1.563
1,560 ppm	1.568
1,565 ppm	1.573

1,550 ppm to PSU

Formula