Question 1

What is 1,040 ppm in PSU?

Accepted Answer

1,040 ppm = 1.045 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 1.045 PSU in ppm?

Accepted Answer

1.045 PSU = 1,039.9 ppm.

ppm	PSU
1,025 ppm	1.03
1,030 ppm	1.035
1,035 ppm	1.04
1,040	1.045
1,045 ppm	1.05
1,050 ppm	1.055
1,055 ppm	1.06

1,040 ppm to PSU

Formula