Grind setting conversion
DF64 DF64 Gen 2 vs Niche Duo
Two grinders cross-shopped at the same money. The Duo is numbered 0–50; the DF64 Gen 2 is numbered 0–90.
| DF64 Gen 2 | Duo | |
|---|---|---|
| Brand | DF64 | Niche |
| Scale | Numbered dial | Numbered dial |
| Dial range | 0 – 90 | 0 – 50 |
| Burrs | Flat | Flat |
| Espresso → filter | 26 numbers | 20 numbers |
| Filter → coarse | 52 numbers | 17 numbers |
The same number means different things
Both grinders use a numbered dial, which makes it tempting to copy a number straight across. Setting 25 sits at grind index 11.3 on the DF64 Gen 2 but 34.2 on the Duo — 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.
| DF64 Gen 2 | Duo |
|---|---|
| 10 | 8 |
| 21.1 | 11.9 |
| 30.4 | 15.9 |
| 32.4 | 20.2 |
| 34.4 | 24.5 |
| 37.9 | 28.4 |
| 47.3 | 30.7 |
| 56.8 | 32.9 |
| 66.2 | 35.1 |
| 73 | 37.5 |
| 78 | 40 |
| 83 | 42.5 |
| 88 | 45 |
| Duo | DF64 Gen 2 |
|---|---|
| 8 | 10 |
| 11.9 | 21.1 |
| 15.9 | 30.4 |
| 20.2 | 32.4 |
| 24.5 | 34.4 |
| 28.4 | 37.9 |
| 30.7 | 47.3 |
| 32.9 | 56.8 |
| 35.1 | 66.2 |
| 37.5 | 73 |
| 40 | 78 |
| 42.5 | 83 |
| 45 | 88 |
Side by side, by brew method
Where each grinder lands for the same brew, worked out from its own dial curve.
| Method | DF64 Gen 2 | Duo |
|---|---|---|
| Espresso | 16.7 | 10.3 |
| Moka pot | 30 | 15 |
| AeroPress (short steep) | 32.4 | 20.2 |
| Pour over — V60 / cone | 35.5 | 27 |
| Pour over — flat bottom | 41.7 | 29.3 |
| Drip / batch brew | 47.3 | 30.7 |
| Chemex | 56.4 | 32.8 |
| French press | 71.2 | 36.6 |
| Cold brew | 80.8 | 41.4 |
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.
DF64 DF64 Gen 2
Niche Duo
Dialing in the DF64 Gen 2
A 64mm flat-burr single-dose grinder that became popular precisely because it puts commercial burrs at a domestic price. Espresso is the design centre; the burr choice you fit matters more to grind character than the dial does.
Dialing in the Duo
The Duo extends the Niche single-dose concept to cover both espresso and brew properly, rather than stretching one dial across both. Like the Zero it is stepless, so treat the numbers below as targets to land near rather than detents.
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 DF64 DF64 Gen 2 and the Niche Duo, 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.
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