Guide · Grinders
Grind size for espresso: how fine to go and how to dial in your shot
There's no single number for espresso grind. Here's what it should look and feel like, how to dial it in with dose and shot time, and where Sage tells you to start.
The right grind size for espresso is fine, but not too fine. Sage’s own manuals describe the target as a grind that lets the shot start flowing after a few seconds and run like warm honey, finishing in about 25 to 35 seconds on its Barista Express. There’s no universal number, because every grinder’s scale is different and every coffee behaves differently. We haven’t tested this in person. This guide is based on Sage’s UK instruction manuals for the Barista Express and Barista Pro. Read how we compare.
What espresso grind looks and feels like
Espresso needs a much finer grind than filter coffee or a cafetière. Sage’s Barista Pro manual gives a useful warning sign for going too far: if the coffee looks like powder and feels like flour between your fingers, it’s too fine. At that point water can’t get through properly, even under pressure, and the shot comes out dark and bitter.
Go too coarse and the opposite happens. Water rushes through, and Sage says the espresso comes out under-extracted, lacking colour and flavour.
So the goal sits between the two. In practice you find it by watching the shot, not by looking at the grounds.
Why there’s no single “right” setting
A number on one grinder means nothing on another. Sage’s Barista Express has 16 settings, from 1 (finest) to 16 (coarsest), while the Barista Pro has 30. Even Sage’s own starting points come with the instruction to adjust as required, which is why the shot itself is the best guide.
Grind size for espresso: Sage’s starting points
If you have a Sage machine with a built-in grinder, its manuals give you somewhere to start:
| Machine | Grind settings | Suggested start | Double-shot dose |
|---|---|---|---|
| Sage Barista Express | 1–16 | 8 | 16–19g |
| Sage Barista Pro | 1–30 | 15 (the default) | 19–22g |
Sage’s Barista Express manual says to start at 8 and adjust from there. The Barista Pro is set to 15 out of the box, and its screen shows a bar for a faster or slower pour as you change the setting. Both manuals recommend tamping with about 15–20kg of pressure.
Sage also says to use single-wall baskets with freshly ground beans, and dual-wall baskets with pre-ground coffee. The dial-in steps below are aimed at single-wall baskets and fresh beans.
How to dial in your shot
Dialling in means adjusting the grind until the shot runs at the right speed. Keep everything else the same while you do it: the same dose, the same tamp and the same amount in the cup.
- Set your dose. Weigh the coffee if you can. Sage’s ranges are above.
- Pull a shot and time it from the moment you press the button.
- Watch when it starts to flow. On the Barista Express, Sage says a good shot starts flowing after 4–7 seconds. On the Barista Pro, which has a longer pre-infusion, it’s 8–10 seconds.
- Look at the flow. Sage describes it as like warm or dripping honey.
- Check the total time. Sage’s Barista Express guide gives 25–35 seconds.
- Adjust one step at a time, then pull another shot.
Reading the results
- It gushes and finishes in under 20 seconds. The grind is too coarse, or the dose is too low. Sage says the result tastes sour and underdeveloped. Grind finer.
- It drips, or barely flows, and takes over 40 seconds. The grind is too fine, or the dose is too high. Sage says this tastes bitter and astringent. Grind coarser.
- It starts in 4–7 seconds, flows like honey and finishes in 25–35 seconds. That’s within Sage’s target range on the Barista Express. Now adjust to taste.
Sage’s Barista Pro manual adds two quick checks. If the espresso starts flowing in less than 6 seconds, the basket is under-dosed or the grind is too coarse. If it drips but doesn’t flow after 15 seconds, the grind is too fine.
Who it isn’t for: anyone using dual-wall baskets with pre-ground coffee. You can’t change the grind of a ready-ground bag, so the timing checks are less useful there.
Fixing sour or bitter espresso
Grind is usually the first thing to change, but not the only one. We’ve covered both problems in more depth in our guides to sour espresso and bitter espresso.
Where to go next
If you’re choosing a grinder, see the best coffee grinders for espresso. For the bigger picture, read how to make espresso at home, or our Sage Barista Express vs Barista Pro comparison if you’re considering a machine with a grinder built in.
FAQ
What grind setting should you use for espresso? There’s no universal number. On the Sage Barista Express, Sage suggests starting at 8. On the Barista Pro, the default is 15. Then adjust based on shot time.
How fine should espresso grind be? Fine, but not powdery. Sage says that if it feels like flour between your fingers, it’s too fine.
How long should an espresso shot take? Sage’s Barista Express guide gives 25 to 35 seconds.
Should you grind finer or coarser if espresso tastes sour? Finer. Sage links a fast, sour shot to a grind that’s too coarse or a dose that’s too low.