1Zpresso J-Ultra vs Kingrinder K4

The 1Zpresso J-Ultra makes the smaller adjustments (2.5 µm a step against 8.4 µm), so it gives finer control between settings. Both reach the same grind sizes, just at different numbers.

Side by side

	1Zpresso J-Ultra	Kingrinder K4
Setting format	Click	Click
Finer direction	Lower numbers	Lower numbers
Smallest adjustment	2.5 µm	8.4 µm
Steps from espresso to French press	264	77
Espresso setting~250 µm	1.0.2	0.30
Moka pot setting~350 µm	1.4.2	0.41
AeroPress setting~450 µm	1.8.3	0.53
V60 setting~560 µm	2.2.8	1.06
Chemex setting~700 µm	2.8.5	1.23
French press setting~900 µm	3.6.6	1.47
Kalita Wave setting~600 µm	2.4.4	1.11
Cold brew setting~1100 µm	4.4.7	2.10
Siphon setting~650 µm	2.6.4	1.17

This compares how the grinders adjust, not build quality, burr type or price. Settings come from one shared particle-size scale fitted from the Honest Coffee Guide and are a starting point.

Convert between them

Questions

Which grinder has finer adjustment, the 1Zpresso J-Ultra or the Kingrinder K4?

The 1Zpresso J-Ultra makes the smaller adjustments (2.5 µm a step against 8.4 µm), so it gives finer control between settings. Both reach the same grind sizes, just at different numbers.

Can I use the same setting on both?

No. A V60 grind is about 2.2.8 on the 1Zpresso J-Ultra and 1.06 on the Kingrinder K4.