Converter for Water Hardness

The total hardness indicates the concentration of alkaline earth ions in the water. In practice, these are mainly calcium and magnesium ions.
The physically correct unit of water hardness is mmol / l. In the past, however, different units were used, which are still widespread today. In order to be able to relate the different units to each other, we provide you with this water hardness converter a simple tool for the quick conversion of the values.