Breville Smart Grinder Pro to 1Zpresso J-Ultra

A V60 grind of about 35 on a Breville Smart Grinder Pro is roughly 2.2.8 on a 1Zpresso J-Ultra. Both land near 560 µm, a medium-fine grind.

Breville Smart Grinder Pro35V60 setting

1Zpresso J-Ultra2.2.8V60 setting

Particle size ~560 µmGrind Medium-fine

Settings by brew method

Brew method	Breville Smart Grinder Pro	1Zpresso J-Ultra
Espresso~250 µm	6	1.0.2
Moka pot~350 µm	15	1.4.2
AeroPress~450 µm	25	1.8.3
V60~560 µm	35	2.2.8
Chemex~700 µm	49	2.8.5
French press~900 µm	68	3.6.6
Kalita Wave~600 µm	39	2.4.4
Cold brew~1100 µm	87	4.4.7
Siphon~650 µm	44	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 Breville Smart Grinder Pro

More about these grinders

Questions

Is 35 on a Breville Smart Grinder Pro the same as 35 on a 1Zpresso J-Ultra?

No. The two grinders count in different steps, so the same number gives a different grind. 35 on the Breville Smart Grinder Pro 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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