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AeroPress grind size

AeroPress grind size on a Fellow Opus

For AeroPress on a Fellow Opus, start at 3.25. That is about 450 µm, a medium-fine grind.

Fellow Opus setting for AeroPress3.25Medium-fine grind, ~450 µm
Finer 3Coarser 3.5Step size 23.3 µm

Adjusting from 3.25

WhenSettingParticle size
Finer: sour or thin cups3~409 µm
Start here3.25~450 µm
Coarser: bitter or dry cups3.5~469 µm

Lower numbers are finer. To grind finer, turn the setting down. Change one step at a time, and brew again before changing anything else.

Starting recipe for AeroPress

Steps

  1. Rinse the paper filter and assemble the AeroPress on a mug.
  2. Add 15 g of coffee and pour 225 g of water, wetting all the grounds.
  3. Stir for 10 seconds, then insert the plunger to stop dripping.
  4. At about 1:30 to 2:00, press gently for 30 seconds.
  5. Taste. Sour: grind finer or steep longer. Bitter: grind coarser or steep shorter.

Other brew methods on a Fellow Opus

AeroPress on other grinders

Questions

What grind setting is best for AeroPress on a Fellow Opus?

Start at 3.25 and adjust by taste. Lower numbers are finer. To grind finer, turn the setting down.

How do I know if I should grind finer or coarser?

Sour or thin: grind finer, steep longer or use hotter water. Bitter or dry: grind coarser, steep shorter or use cooler water.

Where does this setting come from?

The Fellow Opus is mapped to particle size in microns, fitted from the Honest Coffee Guide's settings for this grinder. It is a starting point, not a guarantee.