Skip to content

Tds Calculator

EC
k

Result

TDS320 mg/L (ppm)
Water QualityPoor (marginal)
WHO Guideline< 600 mg/L acceptable; < 300 mg/L preferred
↗ Chemistry

Tds Calculator Calculate Total Dissolved Solids (TDS) from conductivity measurement or estimate water quality category. — free online calculator.

Formula

TDS (mg/L) = Conductivity (µS/cm) × conversion factor k
  • Tds Calculator calculates its result from Conversion Factor K, Conductivity, Μs, Cm. It uses the formula TDS (mg/L) = Conductivity (µS/cm) × conversion factor k. Change any input to recalculate the result instantly.
  • The main inputs are Electrical Conductivity, Conversion Factor. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Tds

Inputs
  • Electrical Conductivity: 500
  • Conversion Factor: 0.64 k

Using Conversion Factor K = 10, Conductivity = 3, Μs = 4, Cm = 5, the calculated result is 24.

Sample result: Calculating…

Frequently asked questions

What does the Tds calculate?

Tds Calculator Calculate Total Dissolved Solids (TDS) from conductivity measurement or estimate water quality category. — free online calculator.

Which values should I enter?

Enter Electrical Conductivity, Conversion Factor using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: TDS (mg/L) = Conductivity (µS/cm) × conversion factor k.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026