Question 1

Is 0.45 on a Niche Zero the same as 0.45 on a Wilfa Svart?

Accepted Answer

No. The two grinders count in different steps, so the same number gives a different grind. 0.45 on the Niche Zero matches about 6 on the Wilfa Svart.

Question 2

How accurate is this conversion?

Accepted Answer

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.

Question 3

The coffee tastes sour or bitter after converting. What should I change?

Accepted Answer

Sour and thin: grind finer by a step or two. Bitter and harsh: grind coarser. Change one thing at a time.

Brew method	Niche Zero	Wilfa Svart
Espresso~250 µm	0.20	Too fine
Moka pot~350 µm	0.28	2
AeroPress~450 µm	0.36	4
V60~560 µm	0.45	6
Chemex~700 µm	0.56	9
French press~900 µm	0.73	14
Kalita Wave~600 µm	0.48	7
Cold brew~1100 µm	0.89	18
Siphon~650 µm	0.52	8

Niche Zero to Wilfa Svart

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