Comandante C40 MK4 to Timemore Chestnut C3

A V60 grind of about 21 clicks on a Comandante C40 MK4 is roughly 15 clicks on a Timemore Chestnut C3. Both land near 560 µm, a medium-fine grind.

Comandante C40 MK421 clicksV60 setting

Timemore Chestnut C315 clicksV60 setting

Particle size ~560 µmGrind Medium-fine

Settings by brew method

Brew method	Comandante C40 MK4	Timemore Chestnut C3
Espresso~250 µm	9 clicks	7 clicks
Moka pot~350 µm	13 clicks	10 clicks
AeroPress~450 µm	17 clicks	12 clicks
V60~560 µm	21 clicks	15 clicks
Chemex~700 µm	26 clicks	18 clicks
French press~900 µm	33 clicks	23 clicks
Kalita Wave~600 µm	22 clicks	16 clicks
Cold brew~1100 µm	40 clicks	28 clicks
Siphon~650 µm	24 clicks	17 clicks

Both grinders are mapped to one particle-size scale, fitted from the Honest Coffee Guide's per-method charts. It is not manufacturer burr-gap data, so treat this as a starting point and adjust by taste.

Go the other way

Timemore Chestnut C3 to Comandante C40 MK4

More about these grinders

Questions

Is 21 clicks on a Comandante C40 MK4 the same as 21 clicks on a Timemore Chestnut C3?

No. The two grinders count in different steps, so the same number gives a different grind. 21 clicks on the Comandante C40 MK4 matches about 15 clicks on the Timemore Chestnut C3.

How accurate is this conversion?

It is a starting point. Both grinders are mapped to particle size in microns, fitted from the Honest Coffee Guide charts for each brew method, not from manufacturer burr-gap specs. Beans, roast and burr wear change the result, so adjust by taste.

The coffee tastes sour or bitter after converting. What should I change?

Sour and thin: grind finer by a step or two. Bitter and harsh: grind coarser. Change one thing at a time.

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