Grind setting conversion
1Zpresso J-Max vs 1Zpresso J-Ultra
Espresso density against a wider all-round band.
| J-Max | J-Ultra | |
|---|---|---|
| Brand | 1Zpresso | 1Zpresso |
| Scale | Clicks | Clicks |
| Dial range | 0 clicks – 450 clicks | 0 clicks – 500 clicks |
| Burrs | Conical | Conical |
| Espresso → filter | 138 clicks | 150 clicks |
| Filter → coarse | 242 clicks | 276 clicks |
The same number means different things
Both grinders use a clicks, which makes it tempting to copy a number straight across. Setting 225 clicks sits at grind index 46.5 on the J-Max but 40.8 on the J-Ultra — far enough apart to change the cup.
Converting a setting
If a recipe quotes a setting for one of these grinders, read across for the equivalent on the other. Rows are spaced evenly by grind size, not by dial number — on a conical burr those are not the same thing.
| J-Max | J-Ultra |
|---|---|
| 70 clicks | 74 clicks |
| 152 clicks | 164 clicks |
| 195 clicks | 210 clicks |
| 202 clicks | 217 clicks |
| 204 clicks | 220 clicks |
| 210 clicks | 227 clicks |
| 241 clicks | 262 clicks |
| 291 clicks | 318 clicks |
| 340 clicks | 374 clicks |
| 374 clicks | 413 clicks |
| 401 clicks | 443 clicks |
| 425 clicks | 471 clicks |
| 450 clicks | 500 clicks |
| J-Ultra | J-Max |
|---|---|
| 74 clicks | 70 clicks |
| 164 clicks | 152 clicks |
| 210 clicks | 195 clicks |
| 217 clicks | 202 clicks |
| 220 clicks | 204 clicks |
| 227 clicks | 210 clicks |
| 262 clicks | 241 clicks |
| 318 clicks | 291 clicks |
| 374 clicks | 340 clicks |
| 413 clicks | 374 clicks |
| 443 clicks | 401 clicks |
| 471 clicks | 425 clicks |
| 500 clicks | 450 clicks |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | J-Max | J-Ultra |
|---|---|---|
| Espresso | 118 clicks | 127 clicks |
| Moka pot | 193 clicks | 208 clicks |
| AeroPress (short steep) | 202 clicks | 217 clicks |
| Pour over — V60 / cone | 206 clicks | 222 clicks |
| Pour over — flat bottom | 219 clicks | 237 clicks |
| Drip / batch brew | 241 clicks | 262 clicks |
| Chemex | 289 clicks | 315 clicks |
| French press | 363 clicks | 400 clicks |
| Cold brew | 415 clicks | 459 clicks |
The shape of each dial
Where the connectors bunch, that grinder’s dial is compressed and single steps count for more. Comparing the two shapes tells you which gives finer control, and where.
1Zpresso J-Max
1Zpresso J-Ultra
Dialing in the J-Max
The J-Max trades coarse range for espresso resolution, and the click density near the fine end is the whole point of the grinder. If you are using it for pour over you are working in the middle of its range and will find it forgiving; if you are pulling shots, expect meaningful taste changes from two or three clicks. It will reach French press, but it is not what you bought it for.
Dialing in the J-Ultra
The J-Ultra widens the useful band relative to the J-Max, trading a little espresso resolution for genuinely usable filter and French press. If you want one hand grinder for everything, this is the one in the range that tries hardest.
Own a different grinder?
Convert between any two of 78 models
The converter runs the same maths for any pair in the catalog.
Open the grind converter →Send me both charts
Every setting for the 1Zpresso J-Max and the 1Zpresso J-Ultra, side by side in your inbox.
One email with both charts. Nothing else unless you ask.
Switching grinders mid-bag?
Log a brew, say how it tasted, and BrewMark tells you which way to move — in whichever grinder’s numbers you are actually using. Free on iOS.
Get the iOS app