Twelve focused calculators, timers and reference guides built for pour-over, espresso and cold brew. No sign-up. No ads. Works offline once the page loads.
Everything you need to weigh, time and measure your daily brew.
Ratios, timers, altitude and cold brew dilution — for pour-over, French press and more.
4 tools →Brew ratio, shot timer and extraction yield from refractometer readings.
3 tools →Grind size, roast levels and water chemistry, distilled into practical charts.
3 tools →Track bean freshness and score cuppings with the official SCA form.
2 tools →The four we reach for every single morning.
Small changes with outsized results in the cup.
Volume is unreliable. A £15 kitchen scale is the single biggest quality upgrade you can make.
Ground coffee loses aromatics within minutes. Whole beans stay fresh for weeks.
Coffee needs some minerals to extract flavor. Aim for 50–150 ppm total hardness.
A cold brewer can drop water temperature by 5–10°C, muting extraction and flavor.
Pour twice the coffee weight in water first, let CO₂ escape, then continue.
Sour? Grind finer. Bitter? Grind coarser. Change one variable at a time.
Ranked by home baristas this month.
The staple. Pick a method, get your dose and water.
Dial in dose in and yield out for perfect ristretto to lungo.
Visual countdown with alerts for every popular method.
Match grind to method with side-by-side visuals.
Official SCA form with automatic totalling.
Built the way tools should be — quiet, fast and yours.
Every tool, forever. No paywalls, no premium tier, no ads.
Open a tool, use it, close the tab. Nothing to sign up for.
All logic runs in your browser. Load once and use on the go.
Deep dives on the variables that change what's in your cup.
Why particle size controls extraction more than any other variable.
Read article →
A repeatable three-shot routine for a balanced shot on any machine.
Read article →
Hardness, alkalinity and why distilled water makes flat coffee.
Read article →