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French press grind size

French press grind size on a Fellow Opus

For French press on a Fellow Opus, start at 8.25. That is about 900 µm, a medium-coarse grind.

Fellow Opus setting for French press8.25Medium-coarse grind, ~900 µm
Finer 8Coarser 8.5Step size 23.3 µm

Adjusting from 8.25

WhenSettingParticle size
Finer: sour or thin cups8~874 µm
Start here8.25~900 µm
Coarser: bitter or dry cups8.5~934 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 French press

Steps

  1. Add 30 g of coarse coffee to the press.
  2. Pour 450 g of hot water and start the timer. Do not plunge.
  3. At 4:00, stir the crust gently and skim any foam.
  4. Press the plunger down slowly and pour right away so it stops extracting.
  5. Taste. Sour: steep longer or grind slightly finer. Bitter or silty: grind coarser.

Other brew methods on a Fellow Opus

French press on other grinders

Questions

What grind setting is best for French press on a Fellow Opus?

Start at 8.25 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: steep longer or grind a little finer. Bitter or silty: grind coarser.

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.