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Reference Guides

Interactive references you'll return to again and again — grind size by brew method, roast level flavor profiles, and water chemistry targets.

Visual grind guide from Turkish to cold brew, with method matches.

Light to dark: flavor notes, best methods and origin tendencies.

Measured hardness, alkalinity and a labelled blending example.

Test one variable at home

Each blended concentration is A × A fraction + B × B fraction. Volume splits follow that fraction.

Convert CaCO3-equivalent concentration using 17.848 ppm per German degree, 17.118 ppm per US grain/gallon, and 10 ppm per French degree.

Convert ion concentrations to CaCO3 equivalents: calcium × 2.497 and magnesium × 4.118; add for estimated total hardness.

Fahrenheit = Celsius × 9/5 + 32. Convert volume using the explicitly distinguished US and Imperial fluid ounces.