Coffee grind size: a practical guide by method.

Coffee grind size: a practical guide by method.

Grind size is the variable that most changes the flavor: a finer grind tends to extract faster and more intensely; a coarser grind tends to extract more smoothly (and can become watery if it's too coarse). A good grind size guide helps you start at the right point and then refine to your liking.

1) Quick guide to grinding by method (starting point)

You use this as a "first shot," then adjust it:

  • Espresso: fine (requires consistency and micro-adjustments)

  • Moka pot (Italian coffee maker): medium-fine grind (very fine espresso can clog)

  • Pour over / V60 / filter: medium

  • AeroPress: medium to medium-fine (depends on the recipe)

  • French press: coarse

  • Cold brew: very thick

2) How to adjust "by taste" (without stress)

When you're grinding, think like this:

If the coffee turned sour / "thin" / lacked substance

This is usually a sign of underextraction → try a thinner material (or longer contact time).

If it became bitter / rough / dry

This is usually a sign of overextraction → try a thicker blend (or less time).

3) Common mistakes that ruin the result (and how to solve them)

  • Changing the coffee but keeping the same settings : different beans require different settings.

  • Moka pot clogged / near-zero flow : grind too fine (or coffee compacted).

  • French press "mud" and bitterness : very fine grind + long brewing time.

  • There was a lack of consistency : the grinder is very heavy here — consistent grinders help to repeat results.

FAQ

What is the right grind for mocha?
Medium-fine grind; espresso that is too fine can block the mocha.

Is there a universal grinding number?
No: each mill “marks differently”. He uses a guide as a starting point and fine-tunes by taste.