The Coffee Science Lab

Four interactive tools that explain the actual mechanism behind common brewing problems and myths — not just "grind finer" advice, but the chemistry underneath it. Built by someone with a food chemistry background, not a content template.

4 tools 0 guesswork — every calculation shows its methodology Updated as the series grows

The Instruments

04 tools in this series

No. 01

Water Chemistry

The Water Bench

Doses calcium, magnesium and alkalinity independently to hit a target water profile — a real mineral recipe in mL, not just "use filtered water."

GH / KH calculatorMineral dosing

Open tool For espresso & pour-over water prep

No. 02

Diagnostic

The Taste Compass

Cross-references perceived strength against taste descriptors to catch what a single "grind finer/coarser" rule misses — including channelling.

No equipment neededSymptom-based

Open tool For "my coffee tastes off" moments

No. 03

Precision Diagnostic

The Control Chart

Plots your refractometer reading on a real brew control chart and flags the case every other calculator misses: in-zone numbers with contradictory taste.

Refractometer requiredEY / TDS

Open tool For readers with a TDS meter

No. 04

Myth-Buster

The Caffeine Ledger

"Dark roast has less caffeine" — demonstrated to be misleading, live. Same math, weight vs. scoop, so you can see the actual mechanism behind the myth.

Weight vs. volumeSpecies matters most

Open tool Most shareable of the four

Not sure which one to open?

If you don't own a refractometer Start with the Taste Compass Answer a few questions about strength and taste — it works from description alone and will tell you if the Control Chart is even worth the equipment investment.

If your coffee tastes flat or dull, not sour or bitter Start with the Water Bench Extraction problems and water problems produce different symptoms — flat/muted often means water, not grind.

If you just want to settle an argument Start with the Caffeine Ledger The fastest, most shareable demonstration in the series — toggle one switch and watch the myth fall apart.