⚙️ Coffee Grind Size Reference

A reference guide to recommended grind sizes for common brewing methods, from fine espresso grinds to coarse cold brew grounds.

Filter by Brew Method

Grind size tracks contact time

The nine methods in this reference sort into three groups, and the ordering is not arbitrary. The longer water sits with the coffee, the coarser you grind, so that total extraction lands in the same place:

Group	Methods	Contact time	Rough particle size
Fine	Espresso, moka pot	25 s - 2 min	200-400 microns
Medium	AeroPress, pour over, drip, siphon	2-4 min	500-900 microns
Coarse	French press, percolator, cold brew	4 min - 24 hr	900-1400 microns

Grinding finer multiplies the surface area water can attack, so extraction runs faster. That is why espresso can finish in half a minute and cold brew needs overnight. Use the filter at the top to narrow the list to one group.

Using the kitchen comparisons

Table salt for espresso - it should clump slightly when you press it, and feel almost like flour between your fingers.
Granulated sugar for pour over and drip. Distinct grains, no powder.
Sea salt for French press, and coarse breadcrumbs for cold brew - the coarsest thing you will ever grind.

At a fixed brew ratio, grind is the lever that decides how the cup tastes. Sour, thin and watery means under-extracted, so go finer. Bitter, drying and hollow means over-extracted, so go coarser. Change one step at a time and brew again before judging.

Blade grinders cannot hit any of these consistently - they chop rather than mill, producing dust and boulders at once. The dust over-extracts while the boulders barely extract, so the cup tastes bitter and sour together. A hand burr grinder outperforms any blade model.

Frequently asked questions

What grind size do I use for a French press?

Coarse, about the texture of sea salt, roughly 900-1100 microns. Anything finer slips through the metal mesh and keeps extracting in the jug.

Can I use pre-ground coffee for espresso?

Only if it is sold specifically as espresso grind. Standard supermarket pre-ground is a medium drip grind and will let a machine gush a watery, sour shot in ten seconds.

How do I tell if my grind is too fine?

The brew slows down or stalls, and the cup tastes bitter and drying. A pour over that takes over four minutes to drain, or an espresso that drips for 40 seconds, is telling you to go coarser.