Alkalinity – alkali swap

Convert between doses of NaOH, Na₂CO₃, NaHCO₃ and Ca(OH)₂ and the corresponding alkalinity as CaCO₃.

Alkalinity – alkali conversion

Select an alkali, enter its dose [mg/L] and the calculator will compute the corresponding alkalinity as CaCO₃ and equivalent doses of the other alkalis.

Alkali

Dose of selected alkali [mg/L]

Alkalinity as CaCO₃ [mg/L]

Alkalinity (KNK₄.₅) [–]

Equivalent doses of other alkalis

Chemical	Dose for same alkalinity [mg/L]
Sodium hydroxide (NaOH)	10.00
Soda ash (Na₂CO₃)	13.30
Bicarbonate soda (NaHCO₃)	20.83
Hydrated lime (Ca(OH)₂)	9.26

The calculation is based on purely stoichiometric equivalent-weight conversions and is indicative only. In practice, chemical purity and operational conditions must be considered.

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