The number everything else hangs off
Coffee to water ratio, explained properly
A brew ratio is two masses. Once that is clear, most of the confusion in coffee recipes turns out to be one word doing two jobs.
Read the guideWritten to be checked
Coffee brewing guides
Each guide names its sources and says what it cannot prove. Where the evidence is genuinely unsettled, it says that too instead of picking a side.
Dose in, beverage out
Espresso ratio without the folklore
Espresso has its own ratio convention, and most arguments about it are really arguments about which two numbers are being divided.
Read the guideTwo numbers, endlessly confused
Strength is not extraction
Strength and extraction are different measurements. Nearly every unhelpful piece of coffee advice comes from treating them as one.
Read the guideThe one upgrade that changes the cup
How to choose a coffee grinder
If you buy one thing, buy the grinder. Here is what actually differs between them, and which differences you will notice.
Read the guideTwo ways water meets coffee
Filter, immersion and what changes
Nearly every brewer is one of two things. Knowing which one you are holding tells you what to change when it goes wrong.
Read the guideWhat transfers, and what does not
What competition brewing actually teaches
Competition recipes are optimised for one coffee, one water and one judge panel. Some of what they teach still survives the trip to your kitchen.
Read the guideNinety-eight per cent of the cup
Water is most of your coffee
A filter brew is almost entirely water. That makes water the biggest ingredient nobody measures — and the easiest one to over-think.
Read the guideFour drinks, one espresso
Flat white, latte, cappuccino, cortado
Nobody governs these names. What separates a flat white from a latte is cup size and how much of the milk is foam — which is at least measurable.
Read the guideWhy nobody can tell you a number
How much caffeine is in your coffee
The honest answer to how much caffeine is in your coffee is a range, and the width of that range is the interesting part.
Read the guideTwo different drinks
Cold brew is not iced coffee
Cold brew and iced coffee are not the same thing made two ways. They differ in method, in what research finds about their taste, and in how long they last.
Read the guideSymptom by symptom
Moka pot troubleshooting
The moka pot is the most misunderstood brewer in most kitchens, and most of its faults come from heat rather than from coffee.
Read the guideAir, light, time
Storing coffee without the myths
Coffee goes stale in ways that are worth understanding, and survives conditions that people worry about needlessly.
Read the guideThe cheapest upgrade
Why a scoop cannot be a recipe
A tablespoon measures volume. Coffee recipes need mass. Those are not the same thing, and the gap between them is why your coffee changes when you switch bags.
Read the guideGrind, dose, yield, time
How to dial in espresso at home
Dialing in means finding a grind, dose and yield that taste good for this coffee on this machine today.
Read the guideWhy these read differently
Most coffee writing asserts. These pages bind every checkable statement either to a visible primary source or to an explicit note that the figure is a CupTune preference. Our method page describes the same policy for the calculators, and the editorial policy says how each page is drafted, checked and corrected.
Start with a tool
Every guide points back at the tool it explains: the ratio calculator, the grind chart, the caffeine estimator, the water blender and the milk drink builder. All eight tools are on one page.
How these guides are written
How are these guides sourced?
Every checkable statement is either linked to a visible primary source on the same page or explicitly labelled as a CupTune-authored preference. That rule is enforced in the build.
Do the guides tell me the right way to brew?
No. They explain what each variable changes and what the evidence does and does not establish. Where research is genuinely unsettled, the guides say that instead of picking a side.
How often are the guides reviewed?
Sourced claims carry a review date and expire from the build if they are not revisited, so a page cannot quietly keep asserting something nobody has checked.