Single-Dose Grinders, Explained: What They Are and Who Needs One

October 29, 2026 – Kristin Faison

If you've spent any time reading about grinders lately, you've seen the phrase "single dose" everywhere. It sounds like a technical upgrade, and in some ways it is. But it's really a different way of using a grinder, and it suits some people far better than others. Here's what it means in practice.

What single dosing actually means

A traditional grinder has a hopper on top. You fill it with a week's worth of beans, and every time you press the button, the grinder pulls from that supply. A single-dose grinder skips the hopper. You weigh out exactly the coffee you're about to brew, pour it in, grind it, and the grinder is empty again.

That's the whole idea. One dose in, one dose out, nothing left behind.

The problem it solves: retention

Every grinder holds back a little ground coffee inside the burr chamber and chute. That's called retention. On a hopper grinder, it might be a gram or two. Doesn't sound like much, but it means the first part of your next dose is yesterday's coffee, already stale.

Retention matters most in three situations:

  • You switch beans often. If you keep a light roast for pour-over and a darker blend for espresso, retained grounds from one end up in the other.
  • You weigh your doses. If you put 18 grams in and only 16.5 come out, your recipe is off before you start.
  • You brew infrequently. Beans sitting in a hopper for days lose freshness faster than beans sealed in a bag.

If none of those describe you, a good hopper grinder is perfectly fine. Plenty of excellent coffee comes out of grinders with hoppers.

What makes a grinder good at single dosing

Taking the hopper off a grinder doesn't automatically make it a good single doser. The design has to support it.

  • Low retention by design. The bean path from burrs to cup should be short and straight, with nowhere for grounds to hide.
  • A dosing cup that catches everything. Grounds should land in a cup you can tap out cleanly, or directly in your portafilter.
  • Easy adjustment. Single dosers often switch between brew methods, so moving between espresso and filter settings needs to be quick and repeatable.

Single-dose and low-retention grinders we carry

Fiorenzato AllGround ProBrew: built for filter coffee

The AllGround ProBrew is a true single-dose grinder. There's no hopper at all. You pour your dose into a 50g stainless cup, grind, and that's the entire bean path. Fiorenzato rates retention at 0.1 to 0.2 grams between doses, which is about as low as home grinders get. The 64mm flat burrs are tuned for pour-over, drip, and immersion, and the 10-micron adjustment steps make dialing in a new coffee precise. It comes in seven finishes, from white to forest green.

Who it's for: Serious filter brewers who rotate through single-origin coffees and want each one to taste like itself.

Baratza Sette line: low retention for espresso

The Sette grinders aren't marketed as single dosers, but their design does the same job. Grounds drop straight down from the burrs into your portafilter, so almost nothing stays inside. The Sette 30 ($299.95) keeps it simple, the Sette 270 ($399.95) adds fine adjustment for real espresso dial-in, and the Sette 270Wi ($599.95) adds a built-in scale that stops at your target dose.

Who it's for: Home espresso drinkers who want fresh doses without changing how they work. You can single dose a Sette or use the hopper, and both work well.

Pietro hand grinders: single dosing by nature

Every hand grinder is a single doser. You load what you need and crank. The Pietro Pro Brewing stands out because it uses 58mm flat burrs, the same size found in many electric grinders, instead of the small conical burrs most hand grinders use. It holds 60g of beans and the burr chamber detaches in seconds for cleaning.

Who it's for: Filter brewers who want flat-burr cup quality without a countertop appliance.

The honest trade-offs

Single dosing adds a step. You weigh beans every time you brew instead of pressing a button. For a lot of people, that's part of the ritual and takes about ten seconds once a scale is on the counter. For others, especially anyone making multiple drinks every morning, it's friction they don't need.

Some single-dose grinders also benefit from a quick spritz of water on the beans before grinding, or a tap on the chute afterward, to reduce static and keep retention low. It's not hard, but it's one more habit.

Should you single dose?

  • Yes, if you brew more than one coffee a week, weigh your doses already, or care about tasting the difference between single origins.
  • Probably not, if you drink the same coffee every day, make several drinks each morning, or want the fastest possible routine.

Either way, you'll want a scale. Our coffee scale guide covers the options, and the Baratza grinder comparison walks through where each Sette fits.

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