MATH: Portafilter.net Talks Total Dissovable Solids
This article is part of our special Back To School Week series:
Ladies and gentlemen, there’s geekery and then there is geekery. Portafilter.net has just published a terrific set of equations for the MojoToGo set. Probably would’ve sounded really good in podcast form. (Sigh…)
Don’t skip this lesson:
Given extraction yield, mass of coffee, mass of water, and water absorption factor, calculate TDS:
TDS = mass of solubles ÷ mass of solution
mass of solubles = extraction yield × mass of coffee
mass of solution = mass of water + mass of solubles – absorbed water
absorbed water = mass of coffee × water absorption factor
Therefore, TDS = mass of coffee × extraction yield ÷ ((mass of water + (mass of coffee × extraction yield)) – (mass of coffee × water absorption factor))
Absolutely fascinating and perfect for making coffee brewing more accessible to consumers.










