Brew Guide
How to Adjust Your Grind Size by Taste
Every grinder is different — so forget the numbers. Learn to dial in your grind by the only metric that matters: how your coffee tastes.
The Challenge
There's No Standard Way to Talk About Grind Size
There isn't a standard way to talk about grind size because every grinder does it differently. Six clicks on a Hario Mini Mill is a completely different grind than the equivalent on a Baratza Encore. That's why most guides talk in analogy — "about the size of sugar granules" — or in relative terms: a Chemex grind is coarser than an AeroPress grind but finer than a French press grind.
This makes it tough to give exact advice. You can follow a recipe perfectly, but if your grinder produces a different particle size at the same "setting," your coffee will taste different. So instead of chasing numbers, we're going to teach you to adjust by taste — the most reliable method there is. Check out our Chemex tutorial and pour over guide for specific brew method starting points.
Relative Grind Sizes by Brew Method
- • French Press — coarsest grind (like coarse sea salt)
- • Chemex — medium-coarse grind (like raw sugar)
- • Pour Over (V60) — medium grind (like table salt)
- • AeroPress — medium-fine grind (like fine sand)
- • Espresso — very fine grind (like powdered sugar)
The Experiment
Same Coffee, Same Water — Only Grind Changed
We brewed four Chemexes using the same amount of grounds, the same water, and the same temperature — the only variable was grind size. All four cups looked the same color in the mug, but the taste was dramatically different.
The too-fine grind left a thick sludge of grounds in the filter. Water moved through painfully slowly, and the resulting cup was over-extracted and unpleasantly bitter. On the other extreme, the too-coarse grind drained in seconds and produced a weak, sour, watery cup.
What We Observed
- • Too fine — sludgy filter, slow drain, bitter and over-extracted
- • Slightly fine — a bit harsh, slightly bitter aftertaste
- • Just right — clean, sweet, balanced, pleasant acidity
- • Too coarse — fast drain, sour, thin, under-extracted
Dialing It In
Finding Your Sweet Spot
Our final brew at 11 clicks on the Hario Mini Mill was quite nice. The grounds weren't over-extracted, the cup was clean, and the sweetness came through beautifully. But here's the thing — that number means nothing on your grinder. What matters is that we got there by tasting and adjusting.
Dark roasts are naturally more bitter and more soluble, so they need a slightly coarser grind to avoid over-extraction. Our lightly roasted El Salvador at that same setting would have you asking for more — bright, sweet, and complex. This is exactly why brew guides give you a range instead of one magic number.
If Your Coffee Tastes Bitter…
- → Grind coarser (fewer clicks / higher number)
- → Water is spending too long with the grounds
- → The coffee is over-extracted
If Your Coffee Tastes Sour…
- → Grind finer (more clicks / lower number)
- → Water is moving through too quickly
- → The coffee is under-extracted
One More Variable
Roast Level Changes Everything
The same grind setting will taste different with different roast levels. Dark roasts are more porous and soluble — they extract faster and lean bitter. Light roasts are denser and need more extraction time to develop their full sweetness and complexity.
This means you'll likely want to adjust your grind each time you switch coffees, especially if the roast level changes. It only takes one or two brews to find the sweet spot. Think of it as part of the fun — getting to know a new coffee.
Quick Roast-Level Grind Guide
- • Light roasts — grind slightly finer to increase extraction and bring out sweetness
- • Medium roasts — start in the middle of your brewer's recommended range
- • Dark roasts — grind slightly coarser to reduce bitterness from fast extraction
- • Switching coffees? — always re-dial your grind; it takes one brew to adjust
The Right Tool
A Good Grinder Makes All the Difference
A burr grinder produces consistent particle sizes, which means even extraction and predictable results. Blade grinders chop beans into random sizes — some powder, some boulders — which makes dialing in nearly impossible. If you're serious about improving your coffee, a grinder is the single best investment you can make.
We recommend Baratza grinders for home use. They're reliable, easy to adjust, and produce consistent grinds across the full range. Browse our guide to dialing in your perfect cup for more tips.
Hario Mini Mill
Great portable hand grinder. Affordable entry point for fresh grinding.
Baratza Encore
Best electric home grinder. Consistent grind, easy to adjust, built to last.
Baratza Virtuoso+
Step up for precision. Digital timer, finer adjustments, quieter motor.
Common Questions
Coffee Grind Size FAQ
Why does my coffee taste bitter?
Bitter coffee is typically over-extracted, meaning the water pulled too much from the grounds. This usually happens when the grind is too fine for your brew method. Try a coarser grind to reduce extraction and balance the flavor.
Why does my coffee taste sour or acidic?
Sour or sharp acidity in coffee means it's under-extracted — the water moved through the grounds too quickly and didn't pull enough flavor. Grind finer so the water has more contact time and can extract the sugars and sweetness.
How do I know what grind size to use for my brewer?
There is no universal grind setting because every grinder is different. Six clicks on a Hario Mini Mill is completely different from a Baratza Encore setting. Instead, start with a recommended range for your brew method and adjust by taste — finer if sour, coarser if bitter.
Should I change my grind size for dark roasts vs light roasts?
Yes. Dark roasts are more soluble and extract faster, so they tend to taste more bitter at the same grind setting. Use a slightly coarser grind for dark roasts. Light roasts are denser and benefit from a slightly finer grind to extract their full sweetness and complexity.
Why do brew guides give a range instead of one exact grind setting?
Because every grinder, coffee, and palate is different. A Chemex grind is coarser than an AeroPress but finer than a French press — but the exact setting varies by grinder. Guides give a range so you can dial in by taste, which is the most reliable method.
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