Question 1

What is 1,640 ppm in PSU?

Accepted Answer

1,640 ppm = 1.648 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 1.648 PSU in ppm?

Accepted Answer

1.648 PSU = 1,640 ppm.

ppm	PSU
1,625 ppm	1.633
1,630 ppm	1.638
1,635 ppm	1.643
1,640	1.648
1,645 ppm	1.653
1,650 ppm	1.658
1,655 ppm	1.663

1,640 ppm to PSU

Formula