Coffee Grind Size Guide: Match Your Grind to Your Brew Method
Most people blame the coffee when the cup tastes wrong. Nine times out of ten, it's the grind.
We've been roasting in small batches in Greenport since 1987. And the number one thing we hear from people who are frustrated with their cup at home — after they've already bought good beans — is that something still feels off. Usually it comes down to grind size.
Get it right and the cup opens up. Bold, smooth, full. Get it wrong and you're stuck with something bitter or sour that no amount of cream fixes. This guide walks you through the whole thing — which grind goes with which brew method, how roast level plays into it, and what to do when something's not tasting right.
And if you want a shortcut — skip to the bottom and try our Coffee Doctor. Answer a few questions, get a diagnosis.
The Simple Rule First
Before we get into specifics: longer brew time needs a coarser grind. Shorter brew time needs a finer grind.
French press steeps for four minutes — coarse grind. Espresso runs in 25–30 seconds — fine grind. Everything else falls somewhere in between. Keep that in mind and the rest of this will make a lot more sense.
Grind Size by Brew Method
| Grind Level | Best For | Our Pre-Ground Option |
|---|---|---|
| Extra Fine | Turkish coffee | Whole Bean |
| Fine | Espresso machine | Espresso Machine (Fine) |
| Medium-Fine | Moka pot, AeroPress | Stovetop Espresso / Bialetti (Medium Fine) |
| Medium | Pour over, drip, AeroPress | Drip / K Cup - Paper Filter (Medium) |
| Medium-Coarse | Chemex, metal filter drip | Drip - Metal Filter (Medium Coarse) |
| Coarse | French press, percolator | French Press / Percolator (Coarse) |
| Extra Coarse | Cold brew | French Press / Percolator (Coarse) |
Breaking It Down by Brew Method
Espresso — Fine
Espresso is fast and high pressure. The grind needs to be fine enough to slow the water down and give it enough to work with in those 25–30 seconds. Small adjustments make a big difference here — even a slight change in grind can shift the shot noticeably.
If you're pulling espresso at home, our Orient Espresso was built for this method. It's our most versatile roast — brown sugar, chocolate, a subtle floral finish. Pulls clean every time.
Moka Pot / Stovetop — Medium-Fine
A little coarser than espresso. The lower pressure means you don't need the same resistance in the grind, and going too fine here tends to produce a bitter, over-extracted result. When you order pre-ground from us, select Stovetop / Bialetti (Medium Fine).
AeroPress — Medium to Medium-Fine
The AeroPress is forgiving. Short brew time, go finer. Longer steep, go coarser. If you're ordering pre-ground, Drip / K-Cup – Paper Filter (Medium) is your closest starting point.
Pour Over — Medium
Pour over is all about controlling the flow. Medium grind lets the water move through at the right pace — not too fast, not too slow. If it drains too quickly, go a little finer. If it takes forever, go a little coarser. Pre-ground pour over customers: Drip / K-Cup – Paper Filter (Medium) is your match.
Automatic Drip — Medium
Most home drip machines are set up for medium grind. A paper filter gives you a cleaner, brighter cup. A metal filter lets the natural oils come through for more body and richness — totally a personal preference call. Start at medium and adjust from there based on what you're tasting.
French Press — Coarse
Four minutes of full immersion means you need a coarse grind. Any finer and the long steep over-extracts the coffee — bitter, flat, muddy. Coarse grind also means fewer fine particles sneaking through the metal screen.
Our Earthy & Seductive blend was practically made for French press — it's deep, full-bodied, and the immersion method really lets it open up.
Cold Brew — Extra Coarse
Cold brew sits with water for 12–24 hours. The grind has to be extra coarse to keep it from over-extracting over that long stretch. For cold brew, we recommend whole bean so you can grind at home to the right range. Our dark roasts make an incredible cold brew concentrate.
Should You Grind Dark Roast Finer or Coarser?
Coarser. Slightly.
Here's why. A dark roast spends more time in the roaster than a medium. That extra time changes the bean's structure — it becomes more porous, more soluble, and easier for water to pull flavor out of. At the same grind setting, a dark roast will give you a bolder, fuller extraction than a medium roast would. Which is great, until it's too much. Then you're in bitter, ashy, over-extracted territory.
The fix is to grind dark roast a touch coarser than you would for that same brew method with a medium roast. You're letting the water through faster so it doesn't pull more than you want.
The shorthand:
- Dark roast: grind slightly coarser than you normally would for that method. It doesn't need as much help extracting.
- Medium roast: grind slightly finer, and push your water temperature up a bit. Medium roasts are denser and need a little more to fully open up.
You'll see this play out most obviously in French press and espresso — the two extremes. We'll get to dark roast espresso in the next section because it has a few wrinkles of its own.
At Aldo's, nearly everything we roast is a French dark roast. We pull at the beginning of second crack — bold and smooth, never burnt. The exceptions are our Guatemala Estate SHB and Ethiopia Yirgacheffe, both mediums. If you're brewing either of those, go a touch finer than your default and target water around 199–202°F.
Grind Size for Dark Roast Espresso (And Why It's Trickier)
Dark roast espresso is one of the most common things we pull at the café, and it's also one of the things people struggle with most at home. Two reasons.
First, espresso needs a fine grind no matter what roast you're using. There's no getting around that — the 9 bars of pressure require resistance from the puck, and only a fine grind gives you that.
Second, dark roast is more porous and extracts faster than medium. Which means at that same fine grind, a dark roast will over-extract in the time a medium roast would pull perfectly. So you need fine, but a touch coarser than fine.
The starting point we use at the café: dial your grinder in for medium roast espresso first, then back off one or two clicks coarser when you switch to a dark roast. Pull a shot. Time it.
- If the shot runs short (under 22 seconds) and tastes bitter or ashy — you're over-extracting. Go a click coarser.
- If the shot runs long (over 32 seconds) and tastes harsh or sour — channeling or too fine. Go a click finer, redistribute the puck.
- If the shot runs 25–30 seconds and tastes balanced — you're there.
The thing nobody tells you: dark roast espresso also forgives small grind mistakes better than light or medium does. The bold flavor profile carries through even on a slightly off shot. That's part of why our Orient Espresso works so well for people pulling their first shots at home — brown sugar, chocolate, subtle floral finish. It tastes good even when your technique isn't perfect yet.
What about medium roast espresso?
Medium roast espresso is a different beast. Light and medium roasts are denser, less porous, and harder to extract. You need a finer grind, higher water temperature, and a little patience.
For medium roast espresso, start a click or two finer than your dark roast setting. Push water temp toward the higher end (199–202°F if your machine lets you control it). Watch your shot time — medium roasts often need slightly longer pulls (28–32 seconds) to fully open up.
Most of what we roast is French dark, so espresso isn't where our medium roasts shine — pour over and drip are. But if you've got a medium roast you're trying to dial in on an espresso machine, that's the starting point.
Something Taste Off? Here's Where to Start.
Before you blame the beans, check the grind. Most cups that taste wrong at home are a grind adjustment away from tasting right.
| What You're Tasting | What's Probably Happening | What to Do |
|---|---|---|
| Sour, thin, hollow | Under-extracted — grind too coarse or brew too short | Grind finer, brew longer, or raise water temp |
| Bitter, flat, ashy | Over-extracted — grind too fine or brew too long | Grind coarser, brew shorter, or lower water temp |
| Muddy, heavy sediment | Too many fine particles getting through | Grind coarser — especially in French press and cold brew |
| Espresso running uneven | Uneven puck or grind slightly too fine | Distribute grounds more evenly, go slightly coarser |
Still can't nail it? Our Coffee Doctor walks you through it step by step — answer a few questions about your setup and your cup, and it'll tell you exactly what to adjust.
☕ Not Sure What's Wrong With Your Cup?
Our Coffee Doctor is a free interactive tool that diagnoses your brew and tells you exactly what to fix — grind, temp, ratio, method. Takes about 60 seconds.
TRY THE COFFEE DOCTOR →The Short Version
Longer brew time, coarser grind. Shorter brew time, finer grind. Dark roasts get a little coarser than mediums for the same method. Taste your cup, make one small adjustment at a time, and trust what you're tasting — that's how you dial it in.
If the cup tastes right, the grind is right.
Not sure where to start with the coffee itself? Our Coffee Discovery Box gives you 8 of our roasts — 1/4 lb each — roasted fresh and shipped fast. Find your favorite without committing to a full bag of each.
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