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Home & Garden • Buying Guide

Flat vs. Conical Burr Grinders for Pour-Over and Espresso

Micron particle distribution analysis and static retention measurements across seven electric domestic burr grinders.

Flat vs. Conical Burr Grinders for Pour-Over and Espresso

A home grinder is doing its job when the coffee tastes even and the counter is not dusted with the grounds that never made it into the brewer.

We ground for pour-over and for espresso and watched the mess, the noise, and whether the cup tasted muddy or clear. The burr shape mattered less than the consistency and the retention.

What ends up in the cup

Static holds fines in the chute and then dumps them into the next cup. A grinder that keeps a dose inside itself is a grinder that makes you guess. Flat and conical both can grind well. A loud, messy, retentive one will not, whatever the burr is called.

  • A step size you can repeat tomorrow morning.
  • Low retention, so the dose you weigh is the dose you brew.
  • A chute you can brush without tools.
  • Enough range for the brewer you actually own.

The grounds that stay in the machine are yesterday’s coffee in today’s cup.

Tomorrow morning

Weigh the dose, grind into the brewer or a cup you can knock out, and purge a gram when you change coffees. That small habit fixes more cups than a new burr set.

Buy for a clean, repeatable grind. Leave the geometry argument for after the coffee tastes right.