Comandante C40 MK4 to 1Zpresso J-Ultra

A V60 grind of about 21 clicks on a Comandante C40 MK4 is roughly 2.2.8 on a 1Zpresso J-Ultra. Both land near 560 µm, a medium-fine grind.

Comandante C40 MK421 clicksV60 setting

1Zpresso J-Ultra2.2.8V60 setting

Particle size ~560 µmGrind Medium-fine

Settings by brew method

Brew method	Comandante C40 MK4	1Zpresso J-Ultra
Espresso~250 µm	9 clicks	1.0.2
Moka pot~350 µm	13 clicks	1.4.2
AeroPress~450 µm	17 clicks	1.8.3
V60~560 µm	21 clicks	2.2.8
Chemex~700 µm	26 clicks	2.8.5
French press~900 µm	33 clicks	3.6.6
Kalita Wave~600 µm	22 clicks	2.4.4
Cold brew~1100 µm	40 clicks	4.4.7
Siphon~650 µm	24 clicks	2.6.4

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

1Zpresso J-Ultra to Comandante C40 MK4

More about these grinders

Questions

Is 21 clicks on a Comandante C40 MK4 the same as 21 clicks on a 1Zpresso J-Ultra?

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 2.2.8 on the 1Zpresso J-Ultra.

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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