How to Dial In a Coffee Grinder: Find Your Grind Number

Last Tuesday a regular set a brand-new stepped grinder on our counter and showed me a screenshot: "espresso = 12." He had already burned through half a bag chasing that number. If you are stuck in the same loop, here is how to dial in a coffee grinder without treating someone else's dial like a recipe. The number on the collar is a bookmark for your burrs and your beans this week. Weigh the dose, brew the same way twice, turn the dial one step, taste, write it down.

The short version

• A grind number only means something on that specific grinder, with those burrs, for that bag of coffee this week.
• Dial-in means: weigh the dose, brew to a fixed recipe, change only the grind, then taste. Repeat in small steps.
• Espresso starting window most shops use: about 18 g in → 36 g out in roughly 25–32 seconds. Filter coffee uses brew time and taste instead of shot time.
• Write the number next to the roast date. When the bag ages a week, you will usually move one or two clicks finer.

What does dialing in a coffee grinder mean?

Dialing in is the unglamorous bit: finding the grind setting that makes this coffee taste balanced on your brewer. Hold dose, water, recipe and tamp still. Only move the grind until the cup stops tasting sharp and thin, or harsh and drying. Baratza's dial-in guide says the same thing we tell new owners at the counter: pick a known recipe, go finer when the shot is sour and fast, coarser when it is bitter and slow, and write down what you changed.

That is a different job from picking a grind texture off a chart. A coffee grind size chart gets you into the right neighborhood (espresso looks like fine table salt; French press is much coarser). Dial-in is what you do once you are already in that neighborhood and the cup still is not right.

What do coffee grinder numbers actually mean?

Those printed numbers are a local ruler. They only mark how far apart the burrs sit on that unit. They do not translate into microns you can copy from a friend, a YouTube short or another brand.

Three reasons copying "setting 12" usually fails:

• Zero points differ. On many grinders the "0" mark is not where the burrs touch. Factory tolerances and a few kilos of seasoning shift the whole scale.
• Stepped and stepless feel different. A 35- or 40-click stepped dial jumps in noticeable chunks. A stepless collar lets you land between marks, so you need your own tick marks with a pen or tape.
• The coffee moves the target. A denser light roast often needs a finer number than a darker roast from the same origin. A bag at day 5 off roast does not behave like the same bag at day 18.

When someone asks what number a coffee grinder should be on, the honest answer from behind our counter is simple. Use whatever number puts your weighed recipe in the right time and taste window on that dial. The notebook is the only chart that travels.

What tools do you need before you touch the dial?

A kitchen scale and a timer are enough. The less the dose wanders, the faster that grind number settles.

Weigh whole beans before they hit the burrs. A coffee bean weighing cup scale at 0.1 g resolution keeps the dose inside a tenth of a gram, which is tight enough that a one-click grind change actually shows up in the cup. For espresso, a mini digital coffee dosing cup scale under the portafilter (or under the cup) lets you stop the shot by weight instead of guessing by volume marks.

If espresso shots keep spraying sideways while you chase the grind, fix distribution first. Channeling disguises itself as a "wrong grind number." A simple WDT espresso distribution tool loosens clumps so the dial-in data is about particle size, not a tunnel through the puck. If you want the espresso-only shot-timing walkthrough, see our espresso grind size dial-in guide.

How to dial in a coffee grinder step by step

This is the routine we walk through when someone buys their first numbered burr grinder. Same logic for espresso or filter. Only the target changes.

1. Warm the brewer. Pull a blank water shot on espresso machines. Preheat the dripper or press. Cold metal steals heat and lies about extraction.
2. Lock the dose. Weigh beans to 0.1 g. For a double espresso basket, 18 g is a common start. For a single-cup pour-over, 15–18 g into 250–300 g water is a workable range. Do not change dose while you are hunting the grind.
3. Pick a starting number in the right zone. Use the manufacturer’s espresso or filter band if the dial has one. On a 35-setting electric grinder, begin toward the coarse end of the espresso band and walk finer. On a 40-setting manual grinder aimed at pour-over, start around the middle of the filter range and move from there.
4. Grind a purge after a big jump. If you moved more than a few clicks, grind and discard a small spoonful so the next dose is the new setting, not a mix of old and new grounds stuck in the chute.
5. Brew to a fixed recipe. Espresso: aim for about 1:2 by weight (18 g in, 36 g out) and note the time from pump start. Filter: use the same pour pattern and total brew time target each attempt.
6. Taste, then move one step. Change only the grind. On stepped grinders, one click (or two if the clicks are tiny). On stepless, a few degrees of collar — mark it with tape so you can find it again.
7. Log it. Coffee name, roast date, dose, yield or brew weight, time, grind number, one taste note. That line is worth more than any internet "best grind number for espresso."

Grind too fine or too coarse? Which way to turn

One more trap: pressurized (dual-wall) baskets. They add artificial resistance, so you can run a coarser grind than a naked basket and still see "espresso-looking" flow. If you are learning dial-in on a dual-wall basket, treat the time window as softer and lean on taste. When you move to a non-pressurized basket, expect to go finer and re-find your number.

Starting grind number ranges (clues, not recipes)

People still want a starting number. Fair enough. Treat the ranges below as a first guess on a clean stepped burr grinder, then dial from taste.

• Espresso on a stepped home grinder: start at the coarse end of the marked espresso band (Baratza’s Encore ESP guidance is the same idea: begin coarse in the espresso range and walk finer). On a generic 35-click dial without labeled bands, many home setups land somewhere in the finer third — but verify with a scale.
• Moka pot: a bit coarser than espresso; if it sputters bitter, open the dial a click or two.
• Pour-over / drip: medium; aim for a total brew around 2:30–3:30 depending on dripper and dose.
• French press: coarse; if the cup is muddy and bitter, go coarser still and shorten the steep a little.

If two units of the same model disagree by several numbers, that is normal. Burr seasoning and zero-point calibration both shift the scale. Trust the cup on your counter.

Espresso vs pour-over numbers on the same dial

One grinder can cover both drinks. The numbers will sit far apart on the dial. Espresso lives near the fine end; pour-over sits much coarser. When you jump between them, purge a dose so retention does not smear yesterday’s espresso fines into today’s V60. That is also why an espresso-capable grinder vs a filter-only grinder matters if espresso is your daily drink — some "coffee grinders" simply cannot get fine enough, no matter how low the number goes.

On a stepless hand grinder I put a paint-pen tick for weekday espresso and another for weekend pour-over. On a stepped dial I just write the number in a notebook. Either way, the mark only matters if you can find it again tomorrow morning.

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How to dial in a coffee grinder FAQ

What does dialing in a coffee grinder mean?

You adjust the grind — usually by turning the numbered dial — until a fixed, weighed recipe tastes balanced. Dose and brew method stay put; only the grind moves.

What number should a coffee grinder be on for espresso?

No single number works everywhere. Start in the fine third of a stepped dial, or at the coarse end of a labeled espresso band. Pull a 1:2 shot by weight. Go finer if it is fast and sour, coarser if it is slow and bitter, then write the number next to that bag.

Why doesn't my friend's grind number work on my grinder?

Dial marks are local. The burr gap at "12," the zero point, burr wear and the coffee all differ. Steal the method — weigh, time, taste — not the number.

How many clicks should I move when dialing in?

Once you are close, move one click. Jump three to five clicks only when the first shot is wildly fast or fully choked, then refine.

Should I change dose or grind first?

Change grind first with the dose locked. Touch the dose only after the grind number is stable, or when the basket is clearly over- or under-filled.

Do I need a scale to dial in a coffee grinder?

You can guess by eye, but a 0.1 g scale removes most of the noise. If the dose keeps drifting, you will never know whether the dial or the scoop spoiled the cup.

Sources

• Baratza — Dialing in Espresso, step-by-step recipe window (18 g / 36 g / 25–32 s) and finer/coarser rules.
• Clive Coffee — Dialing In Your Grinder, first-drop timing and total shot-time windows for home dial-in.
• Breville — How to dial in espresso, grind texture and dose/grind troubleshooting for home machines.
• BrewMark — How to dial in a new grinder, one-variable changes and purge after big dial jumps.

Specs and prices checked on 2026-11-07 (Asia/Shanghai). Product availability can change.