Hardness convertor To converter unit used in hardness expressions. Input: German Degrees (°D) French Degrees (°F) English Degrees (°E) Millival PPM mmol/l German Degrees (°D) French Degrees (°f) English Degrees (°E) milli-equivalent/l - millival ppm CaCO3 mmol/l CaCO3 Other calculators !!! Lenntech BV cannot be held responsible for errors in the calculation, the program itself or the explanation. For question or remarks please contact us. Request a quote Phone: +31 152 610 900 info@lenntech.com Request a quote More from 'Calculators' Length Unit ConverterSurface CalculatorVolume Unit Conversion CalculatorMass Weight ConversionTemperature Unit ConversionPressure Conversion Program and ideal gas lawProcess Flow CalculationVolume Flow Unit ProgramDynamic Viscosity ProgramKinematic Viscosity CalculatorPrefixesConductivity ConverterParts Per Million (ppm) ConverterCollecting RainEnergy to Heat WaterIecost Calculation ProgramTDS CalculatorWind Chill CalculatorRelative HumidityMolecular Weight CalculatorDesign Characteristics for a Municipal Wastewater Treatment Plant CalculationRyznar Stability indexLangelier index calculatorAccuracy water analysis calculationIonic strength and activity coeficientOsmotic pressure calculatorIon exchange calculatorevaporation of water (lake en pan evaporation)Multimedia (sand) FiltrationSeawater Reverse Osmosis Cost Analysis