fine grind · 180-380 microns
1Zpresso K-Ultra grind setting for espresso
Start at 3.8 on the 1Zpresso K-Ultra for espresso, and stay inside 3.0-4.5. Brew at 1:2 for 25-32 s.
Middle of 1Zpresso's band.
- Ratio
- 1:2
- Time
- 25-32 s
- Water
- 90-94 C
Taste, then fix
If it tastes wrong
| It tastes | Why | Do this on the K-Ultra |
|---|---|---|
| Sour, salty, fast (under 22 s) | Under-extracted: grind too coarse | Go 1 to 2 steps finer and pull again |
| Bitter, ashy, slow (over 35 s) | Over-extracted: grind too fine | Go 1 to 2 steps coarser |
| Sour and bitter at once | Channeling: water found a crack in the puck | Keep the grind; stir the grounds (WDT), tamp level, check the dose fits the basket |
| Right time, still sour | Ratio too short for the roast | Pull a longer shot: go from 1:2 toward 1:2.5 |
| Right time, still bitter | Ratio too long or brew too hot | Pull a shorter shot (toward 1:1.8) or drop the temperature 1 to 2 C |
What you are aiming for
Espresso needs the finest grind of any method. Small moves matter: one step on most grinders shifts the shot by several seconds.
On the 1Zpresso K-Ultra, 3.8 is the documented start. If your grounds look much finer or coarser than this, your grinder may be calibrated differently: trust the taste, then the number.
Fix the beans too
The grind is set. Now the beans.
Espresso is where stale beans show first. Coffee 7 to 30 days off roast holds a setting; old coffee drifts every day.
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More 1Zpresso K-Ultra settings
Questions
What grind setting should I use on the 1Zpresso K-Ultra for espresso?
Start at 3.8 on the 1Zpresso K-Ultra for espresso, and stay inside 3.0-4.5. Brew at 1:2 for 25-32 s.
My espresso tastes sour on the 1Zpresso K-Ultra. What do I change?
Sour means under-extracted. Go 1 to 2 steps finer and pull again. Change one thing at a time and taste again.
My espresso tastes bitter on the 1Zpresso K-Ultra. What do I change?
Bitter means over-extracted. Go 1 to 2 steps coarser.
Source
1zpresso.coffee, 1zpresso.coffee. Settings are starting points; two grinders of the same model can sit a step or two apart.