Useful equations

All equations are based on Edelman equation

Increase in SNa by 1L infusate  = (Infusate [Na] - SNa)  ÷  (TBW + 1)

1 mL/kg body weight of 3 percent HTS =  1 mmol/L increase in SNa

Na deficit calculator from MDCalc

Extra HTS to compensate desalination from renal salt wasting: 

Otherwise you may choose to use this online calculator created by the legend nephrologist Dr Richard Sterns: Calculator | Mysite (richardsternsmd.com)