Hardness convertor To converter unit used in hardness expressions. Input: German Degrees (°D) Frensh Degrees (°F) English Degrees (°E) Millival PPM mmol/l German Degrees (°D) French Degreed (°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. Richiedi una guote Tel: +31 152 755 706 info@lenntech.com Richiedi una guote