TDS Calculator
Use this TDS calculator to estimate total dissolved solids either by summing cations and anions from a water analysis or by converting electrical conductivity to an approximate TDS value.
Cations (mg/L)
Anions (mg/L)
Result
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Quick Answer: TDS can be estimated directly from water-analysis concentrations or by the conductivity relation TDS = k_e x EC, where EC is in microSiemens per centimeter and k_e is typically between 0.5 and 0.8.