Question 1

What is 1,225 ppm in PSU?

Accepted Answer

1,225 ppm = 1.231 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 1.231 PSU in ppm?

Accepted Answer

1.231 PSU = 1,225 ppm.

ppm	PSU
1,210 ppm	1.216
1,215 ppm	1.221
1,220 ppm	1.226
1,225	1.231
1,230 ppm	1.236
1,235 ppm	1.241
1,240 ppm	1.246

1,225 ppm to PSU

Formula