Question 1

What is 128.5 PSU in ppm?

Accepted Answer

128.5 PSU = 127,873.4 ppm. Use the converter on this page to convert to other salinity / tds units instantly.

Question 2

How do you convert PSU to ppm?

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 PSU value by the appropriate factor to get ppm, or use the interactive converter above.

Question 3

What is 127,873.4 ppm in PSU?

Accepted Answer

127,873.4 ppm = 128.5 PSU.

PSU	ppm
113.5 PSU	112,946.6
118.5 PSU	117,922.2
123.5 PSU	122,897.8
128.5	127,873.4
133.5 PSU	132,849
138.5 PSU	137,824.7
143.5 PSU	142,800.3

128.5 PSU to ppm

Formula