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Moka pot grind size

Moka pot grind size on a Fellow Opus

For Moka pot on a Fellow Opus, start at 2.25. That is about 350 µm, a fine grind.

Fellow Opus setting for Moka pot2.25Fine grind, ~350 µm
Finer 2Coarser 2.5Step size 23.3 µm

Adjusting from 2.25

WhenSettingParticle size
Finer: sour or thin cups2~316 µm
Start here2.25~350 µm
Coarser: bitter or dry cups2.5~376 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 Moka pot

Steps

  1. Fill the base with hot water to just below the safety valve.
  2. Fill the basket level with coffee. Do not tamp.
  3. Screw the top on and heat gently with the lid open.
  4. Take it off the heat when it starts to sputter, and cool the base under a tap.
  5. Pour right away. Sour: grind a touch finer. Bitter or burnt: grind coarser and lower the heat.

Other brew methods on a Fellow Opus

Moka pot on other grinders

Questions

What grind setting is best for Moka pot on a Fellow Opus?

Start at 2.25 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?

Weak and sour: grind a touch finer. Harsh and bitter: grind coarser and lower the heat.

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.