Water Crafter
Calculate custom brewing water recipes based on Jonathan Gagne's methodology. Control mineral profiles for the perfect extraction.
How it works
Tap water is inconsistent, and distilled water alone extracts flat, sour coffee. Water Crafter models Jonathan Gagne's mineral-addition method — dosing food-grade Epsom salt and baking soda into distilled water to hit a target magnesium, calcium, and bicarbonate profile. Pick a preset built for your brew method, or dial in your own numbers, and get exact gram measurements for any batch size.
Features
Method presets
Balanced, high-clarity, and high-body profiles tuned for pour-over, immersion, and espresso.
Custom targets
Set your own Mg²⁺ and HCO₃⁻ targets in mg/L and get exact dosing back.
Any batch size
Scale a recipe from a single cup to a 20-liter batch — the ratio stays exact.
Save & share
Store your favorite recipes and share a link with the exact profile.
Try it
Preset
Epsom salt
0.304 g
Baking soda
0.055 g
Dissolve into 1L of distilled water before brewing.
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