Question 1

What is 1,285 ppm in PSU?

Accepted Answer

1,285 ppm = 1.291 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 1.291 PSU in ppm?

Accepted Answer

1.291 PSU = 1,284.7 ppm.

ppm	PSU
1,270 ppm	1.276
1,275 ppm	1.281
1,280 ppm	1.286
1,285	1.291
1,290 ppm	1.296
1,295 ppm	1.301
1,300 ppm	1.306

1,285 ppm to PSU

Formula