Water Hardness Calculator
Calculate total hardness from calcium and magnesium concentrations or EDTA titration
Method 1: Ion Concentrations
Method 2: EDTA Titration
Total Hardness
252.8 mg/L CaCO3
Very Hard
Hardness Components
Calcium Hardness149.8 mg/L
Magnesium Hardness103.0 mg/L
Unit Conversions
Grains per Gallon (gpg)14.78
French Degrees (fH)25.3
German Degrees (dH)14.2
Clark Degrees17.7
mmol/L2.525
Practical Effects
Soap Usage Factor3.53x
High - Scale formation likely
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.