1Zpresso K-Ultra to Timemore Chestnut C3

A V60 grind of about 0.7.4 on a 1Zpresso K-Ultra is roughly 15 clicks on a Timemore Chestnut C3. Both land near 560 µm, a medium-fine grind.

1Zpresso K-Ultra0.7.4V60 setting

Timemore Chestnut C315 clicksV60 setting

Particle size ~560 µmGrind Medium-fine

Settings by brew method

Brew method	1Zpresso K-Ultra	Timemore Chestnut C3
Espresso~250 µm	0.3.3	7 clicks
Moka pot~350 µm	0.4.6	10 clicks
AeroPress~450 µm	0.5.9	12 clicks
V60~560 µm	0.7.4	15 clicks
Chemex~700 µm	0.9.2	18 clicks
French press~900 µm	1.1.8	23 clicks
Kalita Wave~600 µm	0.7.9	16 clicks
Cold brew~1100 µm	1.4.4	28 clicks
Siphon~650 µm	0.8.5	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 1Zpresso K-Ultra

More about these grinders

Questions

Is 0.7.4 on a 1Zpresso K-Ultra the same as 0.7.4 on a Timemore Chestnut C3?

No. The two grinders count in different steps, so the same number gives a different grind. 0.7.4 on the 1Zpresso K-Ultra 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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