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Chemex grind size

Chemex grind size on a Porlex Mini II

For Chemex on a Porlex Mini II, start at 12 clicks. That is about 700 µm, a medium grind.

Porlex Mini II setting for Chemex12 clicksMedium grind, ~700 µm
Finer 11 clicksCoarser 13 clicksStep size 58.3 µm

Adjusting from 12 clicks

WhenSettingParticle size
Finer: sour or thin cups11 clicks~670 µm
Start here12 clicks~700 µm
Coarser: bitter or dry cups13 clicks~730 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 Chemex

Steps

  1. Rinse the thick filter well and dump the water.
  2. Add 30 g of medium-coarse coffee.
  3. Pour 60 g, wait 45 seconds, then pour slowly to 480 g by about 2:30.
  4. Let it drain. Total time is around 4:00 to 4:30.
  5. Taste. Sour: grind a little finer. Bitter or muddy: grind coarser.

Other brew methods on a Porlex Mini II

Chemex on other grinders

Questions

What grind setting is best for Chemex on a Porlex Mini II?

Start at 12 clicks 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?

Fast and sour: grind finer by a step or two. Slow and bitter: grind coarser.

Where does this setting come from?

The Porlex Mini II 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.