Your AeroPress does not want espresso-fine grounds. For a medium-roast coffee, the right starting grind is medium-fine, about the texture of fine table salt.
That sits a notch finer than a typical drip setting, yet several notches coarser than espresso. It gives water enough contact with each coffee particle for a balanced cup without turning the plunge into a wrestling match.
The maker’s own FAQ allows anything from fine to medium, while World Barista Champion James Hoffmann’s popular AeroPress method aims near fine table salt. Inside that wide zone, medium-fine is the practical home base for most medium roasts.
Taste settles the last stretch: sour leans finer, bitter leans coarser.
Start Here: Medium-Fine, or Fine Table Salt
Medium-fine is the default grind for medium roast in an AeroPress. Pinch some grounds: they should look and feel like fine table salt, never like flour.
AeroPress’s official FAQ allows anywhere from fine to medium, which is honest but broad. The medium-fine midpoint fills that range perfectly for a medium roast.
Hoffmann’s technique stays toward the fine side of that spread and describes the target as finer table salt. A hand grinder such as the Timemore C2 reaches this zone without fuss.
- Burr type: conical, stainless steel
- Adjustment: stepped click dial
- Bean capacity: up to about 25 g
Use the table below to translate grind labels into what your grounds should look like before each brew.
| Grind | Looks and feels like | Approx. particle size | When AquaPress… use it in an AeroPress |
| Fine | Fine sand or powdered sugar | Roughly 300-450 µm | Very short, strong, espresso-style recipes |
| Medium-fine | Table salt | Roughly 400-600 µm | Standard brews around two minutes |
| Medium | Coarse kosher salt | Roughly 600-800 µm | Longer steeps and inverted styles |
| Medium-coarse | Rough sea salt | Roughly 800-1000 µm | Extra-long, gentle steeps |
Those particle sizes are approximate steering numbers. Neighboring ranges overlap because real grinders drift gradually from one label to the next.
Why a Medium Roast Meets You at Medium-Fine
Grind size sets how fast water can pull flavor out of every particle. Finer grounds expose more surface area, so extraction speeds up; coarser grounds slow it down.
A medium roast carries both bright, acidic edges and developed sweetness with body. Ground too coarse, it can taste thin and sharply sour before any sweetness shows up; ground too fine, it can slide into bitterness and stall the plunge.
An AeroPress is an immersion brewer, meaning all the grounds soak together in still water. That steady soak flattens out small grind errors, which is exactly why the maker can honestly permit a fine-to-medium range.
Coffee pros describe this lever as extraction, meaning the share of each ground that dissolves. The Specialty Coffee Association’s brewing standard treats roughly 18 to 22 percent as the happy zone for brewed coffee.
Coffee education from Barista Hustle frames the whole skill simply: tune grind size by flavor outcome, finer for sourness and coarser for bitterness. Once taste maps onto extraction that cleanly, the fixes below stop being guesswork.
Brew One Standard Recipe Before Touching the Grinder Again
A grind setting only means something inside one recipe, so lock in a baseline and judge from there. The classic AeroPress brewer handles the job with no extras required.
- Filter: standard paper micro-filters
- Servings: one to three cups per pressing
- Body material: BPA-free plastic
- Rinse a paper filter in the cap and lock it onto the chamber, set over a sturdy mug.
- Add 12 grams of medium-fine coffee and level the bed.
- Pour 200 grams of water at about 90 to 93°C (194 to 200°F), wetting all the grounds.
- Press the plunger in roughly 1 cm to seal the chamber, which stops early dripping.
- Steep for two minutes, then give the brewer a gentle swirl.
- Press down slowly over about thirty seconds, stopping when you hear the hiss.
Total contact time lands near the two-minute mark, right in the typical AeroPress window of about one and a half to two and a half minutes.
Those steps echo Hoffmann’s vacuum-seal approach to the standard method. Archives from the World AeroPress Championship show winning recipes roam freely, with doses around 11 to 15 grams and water always held below boiling.
Weighing matters more than eyeballing, so grab a pocket coffee scale before you chase grind changes.
Taste Wrong? Here Is the Taste-to-Fix Map
Under-extracted coffee leaks sharpness, and over-extracted coffee drags bitterness. Read the cup first, then move the grind one small step at a time.
Use the table below to match what you taste to your next grinder move.
| What you notice | What it can indicate | What to try first |
| Sour, sharp tang, thin body, or a plunge that drops almost instantly | Under-extraction, often a grind set too coarse | A slightly finer grind, or a somewhat longer steep |
| Bitter, drying finish, harsh aftertaste, or a plunger that needs real force | Over-extraction, often a grind set too fine | A slightly coarser grind, or a somewhat shorter steep |
| Round enough but dull and flat | Extraction stuck in the bland middle | A touch finer, or extend the steep a bit |
Weak and sour are different problems, and separating them saves wasted adjustments. A clean but thin cup usually wants slightly more coffee, not a finer grind pushing extraction too far.
This taste-first loop travels across brewers; grinding medium roast for drip machines at home follows the same sour-versus-bitter logic.
Your Grinder’s Numbers Do Not Transfer Between Brands
Click counts are private to each grinder brand, so copying a stranger’s number is asking for trouble. Match texture and taste instead, because two grinders showing the same number can produce visibly different grounds.
Electric drinkers reach the same zone easily with the Baratza Encore.
- Burr type: conical, hardened steel
- Settings: 40 numbered steps
- Best use: drip, immersion, and press brewers
Blade grinders chop unevenly and mix dust with boulders, which blurs flavor at any setting. Consistent particles from a burr grinder are the quiet reason recipes work at all.
Aim for the table-salt end of the dial, nowhere near the much finer espresso range. Note your setting once, because returning to a known good spot is faster than hunting for it again.
The Short Version
For medium roast in an AeroPress, grind medium-fine: the feel of fine table salt, sitting between a drip texture and espresso powder.
Brew the baseline recipe above, taste, and adjust one small step finer only if the cup runs sour. Happy pressing.