PPM Calculator Library
Choose the calculator that matches the physical basis of your measurement. Water, gas, and mass conversions use different formulas.
Water and dissolved substances
Density-aware ppm by mass conversions for aqueous samples.
Chloride PPM to mg/L
Convert chloride concentration from ppm to mg/L with an optional solution-density correction for water and brines.
Open calculator Water disinfectionChlorine PPM to mg/L
Convert chlorine in water from ppm to mg/L using solution density for free, combined, or total chlorine readings.
Open calculator General water conversionPPM to mg/L for Water
Convert ppm to mg/L in water with a temperature- or sample-appropriate density correction.
Open calculator Water chemistryFluoride PPM to mg/L
Convert fluoride concentration from ppm to mg/L in water with an optional density correction.
Open calculatorGas conversions
Temperature-, pressure-, and molar-mass-aware ppmv calculations.
CO₂ PPM to mg/L
Convert carbon dioxide ppm by volume to mg/L using temperature, pressure, and the molar mass of CO2.
Open calculator Custom gasPPM to mg/L for Gas
Convert gas ppmv to mg/L with custom molar mass, temperature, and pressure using the ideal gas law.
Open calculator O₂ gas concentrationOxygen PPM to mg/L
Convert gaseous oxygen ppmv to mg/L and mg/m3 using temperature, absolute pressure, and oxygen molar mass.
Open calculator Common gas libraryPPM to mg/L for Gases
Choose a common gas and convert ppmv to mg/L or mg/m3 at custom temperature and pressure.
Open calculatorMass conversions
Convert ppm by mass for weighed materials and samples.