Espresso Shot Running Too Fast or Too Slow? How to Dial It In
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An espresso shot running too fast usually means the water is finding it too easy to pass through the coffee: the grind is too coarse, the dose is too small, or the beans are stale. A shot running too slow is the opposite: grind too fine or too much coffee in the basket. The fix is almost always the same process, called dialing in, where you change one variable at a time until a shot of about twice your dose in weight lands in roughly 25 to 30 seconds.
Below you will find a target recipe, the order to change things in, a symptom table and a worked example of a real-world dial-in session.
Key takeaways
- Common starting point: 18 g of coffee in, about 36 g of espresso out (1:2), in 25–30 seconds.
- Grind size is the main lever. Finer slows the shot; coarser speeds it up.
- Change only one thing per shot and write it down.
- Time is a guide, not the goal. Taste decides: sour and thin means push extraction up; bitter and dry means pull it down.
In this article
- The target: a starting espresso recipe
- Espresso shot running too fast: causes and fixes
- Espresso shot running too slow: causes and fixes
- Symptom table
- A worked dial-in example
- FAQ
The target: a starting espresso recipe
You can’t tell whether a shot is fast or slow without a target. Most baristas and machine makers use something like this as a starting point:
| Variable | Starting value | Normal range |
|---|---|---|
| Dose (dry coffee) | 18 g in a double basket | 14–22 g depending on basket size |
| Yield (liquid espresso) | 36 g | 1:1.5 to 1:2.5 of the dose |
| Shot time | 25–30 seconds from pressing start | About 20–40 seconds |
| Grind | Like fine table salt | Set by taste and time |
Use a scale under the cup. Volume is unreliable because crema makes a shot look bigger than it is. If you need a refresher on the parts of a shot, see what a shot of espresso is.
Espresso shot running too fast: causes and fixes
A fast shot gushes, often looks pale or blond early, and tastes sour, salty or thin. Work through these in order:
- Grind finer. Go one or two small steps at a time. On stepless grinders, make a small turn and purge a gram or two before the next dose so the old grind clears out.
- Check your dose. Weigh it. An under-filled basket leaves headroom, and the puck can shift or crack. Match the dose to the basket: an 18 g basket wants about 17–19 g.
- Check the beans’ age. Coffee loses carbon dioxide over weeks. Older beans offer less resistance and run faster at the same grind, so you have to grind finer and finer as a bag ages. If your shots got faster over a month without any change, this is likely why.
- Check puck prep. Clumps and uneven tamping create channels where water rushes through one weak spot. Distribute the grounds evenly and tamp level.
- Shorten the yield, not the time. If you can’t grind finer, stop the shot earlier (for example at 30 g instead of 36 g). It is still a balanced shot, just a little more concentrated.
Espresso shot running too slow: causes and fixes
A slow shot drips, starts dark, may barely flow, and tastes bitter, harsh or dry. Fix it in this order:
- Grind coarser. Again, small steps.
- Reduce the dose. Too much coffee leaves no room for the puck to expand and can press against the shower screen. Drop a gram.
- Consider very fresh beans. Coffee roasted only a day or two ago still releases a lot of gas, which can make extraction uneven. Many people rest beans several days before using them for espresso.
- Don’t over-tamp to compensate. Once the bed is fully compressed, extra force changes little. Grind is the right tool.
- Check the machine. A clogged shower screen or a pump that sounds strained can choke a shot regardless of grind. Backflush and descale per your manual.
Symptom table
| What you see and taste | Most likely cause | First change |
|---|---|---|
| Under 20 s, sour, thin | Grind too coarse | Grind finer |
| Fast and getting faster every day | Beans aging | Grind finer; buy smaller, fresher bags |
| Fast with spurts or pale streaks | Channeling from clumps or uneven tamp | Improve distribution, tamp level |
| Over 40 s, bitter, dry | Grind too fine | Grind coarser |
| Slow, puck stuck to shower screen | Dose too high for the basket | Lower dose 1 g |
| Right time, still sour | Ratio too short or water too cool | Increase yield 4 g, or raise temperature if adjustable |
| Right time, still bitter | Ratio too long or very dark roast | Reduce yield 4 g, or lower temperature |
For more on how sour and bitter map to extraction, see our guide to under- vs over-extracted coffee.
A worked dial-in example
Here is what a typical session might look like with a new bag of medium-dark beans, 18 g dose, aiming for 36 g. This is an illustration of the method, not a recipe for your specific grinder.
| Shot | Grind setting | Dose | Yield | Time | Taste | Next move |
|---|---|---|---|---|---|---|
| 1 | 10 | 18 g | 36 g | 16 s | Sour, thin | Grind finer |
| 2 | 8 | 18 g | 36 g | 23 s | Less sour, still sharp | Grind a little finer |
| 3 | 7 | 18 g | 36 g | 28 s | Sweet, balanced, slight bite | Keep grind, try longer ratio |
| 4 | 7 | 18 g | 40 g | 31 s | Rounder, sweeter | Lock it in |
Notice the pattern: big moves first, small moves near the target, and only one variable changed per shot. Shot 4 also shows that once time is close, adjusting yield fine-tunes flavor more precisely than grind.
Typical ratios to aim for
- Ristretto: about 1:1 to 1:1.5. Intense, syrupy.
- Normale: about 1:2. The default.
- Lungo: about 1:3. Lighter, more bitter edges.
Our guide to ristretto vs lungo goes deeper on those styles.
Beans make dialing in easier
Consistency starts with the coffee. Beans that are roasted recently and evenly behave predictably from shot to shot, and you won’t be chasing your grinder as a stale bag speeds up. Every Feel Espresso coffee is roasted 1–5 days before delivery. Good starting points for espresso: the 6 Bean Blend, a dark roast built for espresso with dark chocolate notes and thick crema; the African Espresso, a medium-dark blend from Kenya, Tanzania and Ethiopia with red fruit and chocolate; and for evenings, the Decaf Espresso, a water-process decaf roasted dark. Expect to adjust your grind when switching between them; every coffee dials in a little differently.
Espresso shot timing FAQ
When do you start timing an espresso shot?
Pick one rule and stick to it. Most people start the timer when they press the brew button, including any pre-infusion. Consistency matters more than the exact convention.
Is a 20-second shot always bad?
No. Some light roasts and some machines taste great at 20 seconds. If it tastes sweet and balanced, it is right.
Should I change the tamp pressure to fix shot time?
Not as a main tool. Tamp firmly and level the same way every time, and use grind size to change speed.
Why did my shot suddenly speed up with the same settings?
Common reasons: a new bag of beans, a drop in dose, the beans getting older, or a grinder setting that slipped. Weigh the dose first.
Sources
- How to dial in espresso: the beginner’s guide, Breville, accessed 2026.
- Espresso extraction time and ratio: a complete guide, Clive Coffee, accessed 2026.
Facts checked in October 2026.
Keep reading: How to make espresso at home · Coffee grind size chart · Espresso blends