Dial-In
The process of adjusting grind, dose, and yield until a coffee tastes balanced. Most commonly used for espresso, where it usually takes 3–5 shots.
Dialling in is the iterative process of changing grind size (and sometimes dose, yield, or temperature) on your equipment until a specific coffee tastes balanced — not sour, not bitter, not thin, not harsh. Every new bag of coffee usually needs to be dialled in because grind density and bean behaviour shift between coffees.
What changes between coffees
Even from the same roaster, a different bean behaves differently in the basket. Density, roast level, processing, freshness, and humidity all change how the grounds resist water. A grind setting that pulled a perfect shot on yesterday's Ethiopian will run too fast on today's Colombian — that's normal, and dialling in is the fix.
The minimum dial-in loop
- Pick a starting recipe. 1:2 ratio (18 g in, 36 g out, 25–30 s) is the safe default.
- Pull the shot. Distribute, tamp, lock in. Start shot + timer together. Cut at target yield.
- Taste. Identify the dominant flaw — sour, bitter, or balanced-but-flat.
- Adjust grind. Sour = finer. Bitter = coarser. One notch at a time.
- Repeat. Most coffees converge in 3–5 shots with logging.
Why logging matters
Without a brew log, the third shot fixes the second's problem and the fifth has drifted because you forgot what worked. With a log, you can compare attempt 3 to attempt 5 directly and see exactly which adjustment moved the cup. Most untracked dial-ins take 8–12 shots; tracked ones land in 3–5.
Espresso vs. pour over dial-in
Espresso is the canonical use case because it's the most parameter-sensitive — tiny grind changes produce big extraction changes. But pour over can be dialled in the same way: same coffee, same dose, same ratio, varying grind across 3 brews until the cup is balanced.
Related terms
- Extraction Yield — the measurement dial-in converges toward.
- Brew Ratio — held constant during dial-in; grind is the variable.
- Channeling — the puck-prep failure mode that derails dial-ins.
Read more
Espresso dial-in tool → · Full dial-in guide →
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