Hario Skerton Pro to 1Zpresso K-Ultra

A V60 grind of about 3 clicks on a Hario Skerton Pro is roughly 0.7.4 on a 1Zpresso K-Ultra. Both land near 560 µm, a medium-fine grind.

Hario Skerton Pro3 clicksV60 setting

1Zpresso K-Ultra0.7.4V60 setting

Particle size ~560 µmGrind Medium-fine

Settings by brew method

Brew method	Hario Skerton Pro	1Zpresso K-Ultra
Espresso~250 µm	1 clicks	0.3.3
Moka pot~350 µm	1 clicks	0.4.6
AeroPress~450 µm	2 clicks	0.5.9
V60~560 µm	3 clicks	0.7.4
Chemex~700 µm	4 clicks	0.9.2
French press~900 µm	5 clicks	1.1.8
Kalita Wave~600 µm	3 clicks	0.7.9
Cold brew~1100 µm	6 clicks	1.4.4
Siphon~650 µm	3 clicks	0.8.5

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 K-Ultra to Hario Skerton Pro

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Questions

Is 3 clicks on a Hario Skerton Pro the same as 3 clicks on a 1Zpresso K-Ultra?

No. The two grinders count in different steps, so the same number gives a different grind. 3 clicks on the Hario Skerton Pro matches about 0.7.4 on the 1Zpresso K-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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