Grind your fair-trade coffee for an AeroPress at a medium-fine setting, about the texture of fine sea salt or table salt. That’s the baseline recommended by both AeroPress’s official brew guides and specialty coffee educators. The fair-trade label itself doesn’t change anything: fair-trade is a certification about how the coffee was sourced, not about the roast level, the bean density, or the grind it needs. What changes your grind setting is the roast level of the specific bag in your hand, so start medium-fine and adjust from there.
The Short Answer: Medium-Fine
Medium-fine means slightly finer than a drip grind, but noticeably coarser than espresso. Visually, the grounds should look like fine sand or table salt, with some slight variation between particles, which is fine for this brewer. AeroPress describes grind size as one of the key brewing variables and encourages experimenting with it to taste.
Coffee Project NY, a specialty coffee education company, gives the same starting point in its AeroPress brew guide. A good recipe to pair with that grind is 14 to 18 grams of coffee with 200 to 240 grams of water, brewed for roughly 1.5 to 2.5 minutes total.
Why does medium-fine work so well here? The AeroPress is a hybrid brewer: it steeps the grounds like a French press (immersion brewing), then pushes water through the bed under pressure like a pour over. A medium-fine grind gives the water enough particle surface area to extract fully during that short steep, without stacking so much resistance that the press stalls.
If you need a grinder that can hit this range consistently, a burr grinder is the tool for the job. Blade grinders chop beans unevenly, so the same scoop can produce both dust and boulders, which brews unevenly.
- Key Specifications:
- Grind type: conical burr, stepped or steppedless adjustment
- Target texture: fine sand, between drip and espresso
- AeroPress dose range: about 14 to 18 grams per brew
- Usability: hand grinder or electric, single-dosing friendly
Two approachable options are the Baratza Encore ESP (electric, a common recommendation for AeroPress range) and the Timemore Chestnut C2 (manual, budget-friendly).
What Fair-Trade Actually Means for Your Grind
Fair-trade certification means the coffee was sourced through a system meant to give smallholder farmers better prices and working conditions, per Fairtrade International and fair-trade USA. It says nothing about roast level, bean density, processing method, or how finely the beans should be ground.
Most fair-trade certified lots are 100 percent arabica coffee from smallholder cooperatives, often grown at high altitude. That’s a clue about what’s usually in the bag, which is why origins common in fair-trade programs, like Colombian or Guatemalan cooperatives, tend to be great all-around AeroPress beans.
The label that matters for your grinder setting is on the front of the bag: light, medium, or dark roast. Roast level changes the density and solubility of the bean, which changes how fast it extracts in the chamber, which means different grind settings for different roasts. This is exactly what James Hoffmann notes in The World Atlas of Coffee: grind settings need to move with roast level and bean density, not stay fixed.
An analogy: asking how to grind “fair-trade coffee” is like asking what pressure to use for “organic tomatoes.” You’d need to know how ripe they are and what you’re cooking to answer. Read more: if your bag is destined for a different brewer, the answer changes completely, so this guide covers grinding fair-trade for drip coffee and this one covers the espresso grind.
Adjusting for Light, Medium, and Dark Roasts
Use the table below to pick your starting grind by roast level, then fine-tune by taste.
| Roast Level | Starting Grind | Why |
|---|---|---|
| Light roast (e.g., washed Ethiopian or Kenyan lots) | Fine to medium-fine, like fine sand | Dense, less soluble beans need more particle surface area to extract fully; hotter water helps too |
| Medium roast (e.g., Colombian, Peruvian, Guatemalan) | Medium-fine, like table salt | The standard sweet spot for AeroPress immersion plus pressure brewing |
| Dark roast (e.g., Sumatran or French/Italian roast) | Medium to slightly coarser, like coarse sand | Porosity developed during dark roasting dissolves faster, so less surface area is needed |
Each row is a guideline, not an exact prescription, since roast degree varies between roasters. James Hoffmann’s approach (published in The World Atlas of Coffee) is similar: finer for lighter and denser roasts, coarser for darker ones, hotter water for light roasts and cooler for dark.
Troubleshooting by Taste and Feel
Use the table below to diagnose your brew by taste and by how the plunger feels, then correct the grind.
| What You Notice | Likely Cause | The Fix |
|---|---|---|
| Tastes sour, thin, or hollow | Under-extraction: water moved through too fast | Grind one or two notches finer, or extend the steep slightly |
| Tastes bitter, harsh, or dry | Over-extraction: too much dissolved | Grind coarser or shorten the steep |
| Plunger feels very hard to press | Too much resistance in the coffee bed | Grind coarser; press gently with steady arm weight |
| Plunger drops with no resistance at all | Bed is too coarse, water channels around particles | Grind finer to build the resistance the AeroPress needs |
Make sour vs. bitter your anchor. As Barista Hustle’s brewing framework explains, sourness and thin body tend to come from under-extraction, while bitterness and dryness come from over-extraction. That single distinction tells you which direction to move the grind.
Troubleshooting doesn’t stop at grind, though. Many people grind finer and finer chasing a “weak” cup when the actual problem is dose: too little coffee for the amount of water. Keep the grind near the recommended setting, and change dose or steep time first if the brew is close.
A Recipe to Start With
A concrete starting recipe ties all of this together. For a standard mug of Americano-style AeroPress coffee:
- Dose: 15 grams of coffee (weigh whole beans before grinding, since a scale is more reliable than scoop volume)
- Brew water: 220 grams at around 90 degrees Celsius
- Method: Standard upright orientation, paper filter rinsed in the cap
- Timing: Add water, stir about 10 seconds, steep until 1:30, then press gently over 30 to 45 seconds
Then keep the ratio and grind advice above in mind: if it’s sour, grind slightly finer or dose more; if it’s bitter, grind coarser or drop the water temperature.
If you brew inverted or use a metal filter, expect to adjust: both change the dynamics of extraction slightly, and neither needs a fixed recipe.
Conclusion
The short answer: grind fair-trade coffee at medium-fine, like table salt, to start, then adjust by taste, with just a touch finer for light roasts and coarser for dark roasts. Start with 15 grams of coffee to 220 grams of water at 90 degrees Celsius, steep about 90 seconds, and press gently. Brew once, taste, and change only one variable at a time.