This one-of-a-kind tool forgoes the need for an expensive TDS meter, and still allows you to dial in your brew by taking advantage of our ground-breaking research. Perfect coffee for everyone! Forever!

Use the sliders or input your own values to the right of each slider.  The calculator will automatically estimate the TDS of your brew. The Calculator is designed to work for Chemex brews using an EK43 grinder.  The SCAA recommended TDS range is 1.2%-1.4%.