Alkalinity Conversion (mg/L as CaCO3 to meq/L)

Converts alkalinity (carbonate and bicarbonate, reported as CaCO3) from mg/L to meq/L for use in the Larson-Skold Index. The equivalent weight of CaCO3 is 50.

$${\text{Alk}}_{\text{meq/L}}=\frac{{\text{Alk}}_{{\text{mg/L as CaCO}}_3}}{50}$$

Variables

Symbol	Meaning	Unit
$Al{k}_{mg/LasCaC{O}_3}$	Alkalinity reported as calcium carbonate	mg/L as CaCO3
50	Equivalent weight of calcium carbonate	mg/meq

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Part of The Blueprint of Water