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AeroPress grind size

AeroPress grind size on a Timemore Chestnut C3

For AeroPress on a Timemore Chestnut C3, start at 12 clicks. That is about 450 µm, a medium-fine grind.

Timemore Chestnut C3 setting for AeroPress12 clicksMedium-fine grind, ~450 µm
Finer 11 clicksCoarser 13 clicksStep size 40.7 µm

Adjusting from 12 clicks

WhenSettingParticle size
Finer: sour or thin cups11 clicks~421 µm
Start here12 clicks~450 µm
Coarser: bitter or dry cups13 clicks~481 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 Timemore Chestnut C3

AeroPress on other grinders

Questions

What grind setting is best for AeroPress on a Timemore Chestnut C3?

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?

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 Timemore Chestnut C3 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.