Guide to Tanks >> Tools >> Langelier Saturation Index Calculator
To use the Langelier Index calculator, simply enter your values for pH, Temperature (in °C), TDS (mg/L), Ca, and Alkalinity (as CaCO3) in the boxes below and then click on the "Calculate Now" button.
Temperature (°C): 
pH: 
TDS (mg/L): 
Ca (mg/L):  asCa2+    CaCO3
Alkalinity (mg/L as CaCO3): 
 
Langelier Index: 

Saturation Index Calculator provided courtesy of SVL Analytical, Inc. – www.svl.net.