Question 1

What is 1,380 ppm in PSU?

Accepted Answer

1,380 ppm = 1.387 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 1.387 PSU in ppm?

Accepted Answer

1.387 PSU = 1,380.2 ppm.

ppm	PSU
1,365 ppm	1.372
1,370 ppm	1.377
1,375 ppm	1.382
1,380	1.387
1,385 ppm	1.392
1,390 ppm	1.397
1,395 ppm	1.402

1,380 ppm to PSU

Formula