The table below shows conversions between water conductivity and resistivity. It also converts resistivity to conductivity, and to parts per million or milligrams per liter (ppm, mg/L).
Water Quality Conductivity Conversion Table
mg/L Sodium Chloride |
Total Dissolved Solids as mg/L CaCO3 |
Specific Conductance (Microsiemens/cm) |
Specific Resistance Megaohm Ω |
Grains per Gallon Sodium Chloride |
0.05 | 0.043 | 0.105 | 9.5238 | 0.0029 |
0.1 | 0.085 | 0.212 | 4.71698 | 0.0060 |
0.2 | 0.170 | 0.424 | 3.55849 | 0.012 |
0.3 | 0.255 | 0.637 | 1.56985 | 0.018 |
0.4 | 0.340 | 0.848 | 1.17924 | 0.023 |
0.5 | 0.425 | 1.06 | 0.943396 | 0.029 |
0.6 | 0.510 | 1.273 | 0.785545 | 0.035 |
0.7 | 0.595 | 1.985 | 0.6734 | 0.041 |
0.8 | 0.680 | 1.696 | 0.589622 | 0.047 |
0.9 | 0.765 | 1.908 | 0.524109 | 0.053 |
1 | 0.85 | 2.12 | 0.471698 | 0.06 |
2 | 1.70 | 4.24 | 0.235849 | 0.12 |
3 | 2.55 | 6.37 | 0.156985 | 0.18 |
4 | 3.40 | 8.48 | 0.117924 | 0.23 |
5 | 4.25 | 10.6 | 0.094339 | 0.29 |
6 | 5.10 | 12.73 | 0.078554 | 0.35 |
7 | 5.95 | 14.85 | 0.06734 | 0.41 |
8 | 6.80 | 16.96 | 0.058962 | 0.47 |
9 | 7.65 | 19.08 | 0.05241 | 0.53 |
10 | 8.5 | 21.2 | 0.047169 | 0.58 |
20 | 17.0 | 42.4 | 0.023584 | 1.17 |
30 | 25.5 | 63.7 | 0.015698 | 1.75 |
40 | 34.0 | 84.8 | 0.011792 | 2.34 |
50 | 42.5 | 106.0 | 0.009433 | 2.92 |
60 | 51.0 | 127.3 | 0.007855 | 3.51 |
70 | 59.5 | 148.5 | 0.006734 | 4.09 |
80 | 68.0 | 169.6 | 0.005896 | 4.68 |
90 | 76.5 | 190.8 | 0.005241 | |
100 | 85 | 212 | 0.004716 | 5.85 |
200 | 170 | 410 | 0.002439 | 11.70 |
300 | 255 | 610 | 0.001639 | 17.5 |
400 | 340 | 812 | 0.001231 | 23.4 |
500 | 425 | 1,008 | 0.000992 | 29.2 |
600 | 510 | 1,206 | 0.000829 | 35.1 |
700 | 595 | 1,410 | 0.000709 | 40.9 |
800 | 680 | 1,605 | 0.000623 | 46.8 |
900 | 765 | 1,806 | 0.000553 | 52.6 |
1,000 | 850 | 2,000 | 0.0005 | 58.5 |
2,000 | 1700 | 3,830 | 0.000261 | 117 |
3,000 | 2550 | 5,760 | 0.000176 | 175 |
4,000 | 3400 | 7,500 | 0.000133 | 234 |
5,000 | 4250 | 9,240 | 0.000108 | 292 |
6,000 | 5100 | 10,950 | 0.000091 | 351 |
7,000 | 5950 | 12,650 | 0.000079 | 409 |
8,000 | 6800 | 14,340 | 0.000069 | 468 |
9,000 | 7650 | 16,000 | 0.000062 | 526 |
10,000 | 8500 | 17,600 | 0.000056 | 585 |