App description

Water hardness online calculator

Usually the hardness of water is as follows:

<table border="1" cellpadding="3" id="table1" width="239" height="128"> <tr> <td>mg/L</td> <td>Hardness</td> </tr> <tr> <td>0 - 75</td> <td>Soft</td> </tr> <tr> <td>75 - 150</td> <td>Moderately hard</td> </tr> <tr> <td>150 - 300</td> <td>Hard</td> </tr> <tr> <td>300 and up</td> <td>Very hard</td> </tr> </table>

The hardness calculation caused by each ion is calculated by the following formula

Hardness (in mg/L) as CaCO3 = M2+ (mg/L) x (100 g/mol CaCO3 / atomic weight M2+)

The following calculator determines the hardness of the water to the concentration of divalent cation calcium, magnesium, manganese, iron, strontium.

Usage example

Ca2+ ：2 mg/l

Mg2+ ：4 mg/l

Fe2+ ：2 mg/l

Sr2+ ：0 mg/l

Mn2+ ：20 mg/l

Click "Calculate" and output the result.

61.43367532152048 as mg/L calcium carbonate.

Note

The input value must be added to each box (i.e. if not, enter 0).