Interactive
Tools
Five tools that take the calculating and the guessing off your hands. Everything runs in your browser, nothing is sent anywhere.
Ratio
Brew calculator
Work out coffee and water for every method: espresso, pour over, french press, AeroPress, moka pot, cold brew. With number of cups, strength and grind size.
OpenEffect
Caffeine calculator
How much caffeine you have had today and how much is still in your blood at midnight. With half life and daily guideline.
OpenSensory work
Aroma wheel
The interactive coffee aroma wheel: nine families, more than 40 notes, each with a description and typical origins. For naming what you taste.
OpenRoasting
Roast level explorer
The slider through the roast: bean colour, temperature, aromas, acidity, body and the matching brewing method for every roast level from cinnamon to italian.
OpenBuying advice
Brewer finder
Five questions about drink, budget, time, quantity and space, and the finder names the three brewers that suit you.
OpenTo share
Coffee type quiz
Eight questions, six coffee types, one result to share: find out whether you are an espresso purist, filter aesthete, milk coffee lover, cold brew free spirit, roast tinkerer or traditionalist.
Start