Option-O Lagom P64 to Timemore Chestnut C2

A V60 grind of about 3.2 on a Option-O Lagom P64 is roughly 18 clicks on a Timemore Chestnut C2. Both land near 560 µm, a medium-fine grind.

Option-O Lagom P643.2V60 setting

Timemore Chestnut C218 clicksV60 setting

Particle size ~560 µmGrind Medium-fine

Settings by brew method

Brew method	Option-O Lagom P64	Timemore Chestnut C2
Espresso~250 µm	0.1	8 clicks
Moka pot~350 µm	1.1	11 clicks
AeroPress~450 µm	2.1	14 clicks
V60~560 µm	3.2	18 clicks
Chemex~700 µm	4.6	22 clicks
French press~900 µm	6.6	28 clicks
Kalita Wave~600 µm	3.6	19 clicks
Cold brew~1100 µm	8.6	34 clicks
Siphon~650 µm	4.1	20 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 C2 to Option-O Lagom P64

More about these grinders

Questions

Is 3.2 on a Option-O Lagom P64 the same as 3.2 on a Timemore Chestnut C2?

No. The two grinders count in different steps, so the same number gives a different grind. 3.2 on the Option-O Lagom P64 matches about 18 clicks on the Timemore Chestnut C2.

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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