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Total Dissolved Solids — PPM to mg/L

Convert TDS from PPM to mg/L for water quality testing.

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Formula: ppm × 1 = mg/L
How to use this converter
  1. 1Enter TDS in PPM.
  2. 2mg/L is the same value.
Common questions
Under 300 ppm is excellent. Over 1200 ppm is unacceptable. RO systems produce 10-50 ppm.
Electrical conductivity to estimate dissolved solids. Detects minerals and salts but not bacteria or chlorine.
Related converters
PPM to mg/L ConverterGPG to PPM ConverterChlorine PPM to mg/L