Question 1

What is 21.5 PSU in mg/L?

Accepted Answer

21.5 PSU = 21,395.2 mg/L. Use the converter on this page to convert to other salinity / tds units instantly.

Question 2

How do you convert PSU to mg/L?

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 mg/L, or use the interactive converter above.

Question 3

What is 21,395.2 mg/L in PSU?

Accepted Answer

21,395.2 mg/L = 21.5 PSU.

PSU	mg/L
15.5 PSU	15,424.4
17.5 PSU	17,414.7
19.5 PSU	19,404.9
21.5	21,395.2
23.5 PSU	23,385.4
25.5 PSU	25,375.7
27.5 PSU	27,365.9

21.5 PSU to mg/L

Formula