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Flexible Conversion between TDS and EC

TDS refers to the content of total dissolved solids in water, including inorganic salts, organic matter, suspended solids, while electrical conductivity (EC) refers to the ability of ions in water to conduct an electrical current. There is a positive correlation between TDS and EC. This online calculator can be used to convert the total dissolved solids into the conductivity of water by specifying a conversion factor.


Notes: EC standards for electrical conductivity in the terminology, and on some conductivity meters, EC (short for electrical conductivity unit) and CF (short for conductivity factor) are often used as units. 1 EC = 0.1 CF = 1 μs/cm.

Please fill in:
0.5 < k <0.8
Electrical Conductivity:
  • S/m
  • S/cm
  • mS/cm
  • μS/cm
  • EC
  • CF
  • mho/m
  • mho/cm

Notes: The conversion factor k is subject to many factors and varies from region to region. It typically ranges from 0.5 to 0.8 and is often taken as 0.64.