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Coffee Grind Size Calculator & Guide

Use this coffee grind size calculator: pick your brew method and get the right grind size, texture, and grinder setting to start from.

Grind size by brew method, from espresso to French press

Grind size

Drip / Pour-Over

Medium

Particle size

600 – 800 microns

Feels like

Like coarse sand

Where it sits, finest to coarsest

FinestMediumCoarsest

Next: Start at medium. Sour or draining too fast? Grind finer. Bitter or draining too slowly? Grind coarser. Dial numbers differ between grinders, so treat this as a starting point.

The logic behind the calculator

This tool isn't a numeric formula — it's a lookup table matched to each brew method's typical contact time. Espresso (seconds of contact) needs particles in the 300–400 micron range; French press (minutes of contact) needs 800–1000+ microns. The shorter the contact time, the finer the grind needs to be to extract enough flavor in that window.

Grinder dial numbers aren't standardized across brands, so the calculator reports particle size and texture (like "coarse sand") rather than a specific click number — that's the only description that transfers reliably between different grinders.

How to use the result

  1. 1Pick your brew method.
  2. 2Set your grinder near the suggested setting.
  3. 3Brew, taste, and move one step finer or coarser.

Common mistakes

  • Changing several variables at once.
  • Expecting dial numbers to match another grinder.
  • Using a blade grinder, which makes uneven particles.

What this calculator assumes

Every fixed figure the maths uses, so you can check the result against your own gear.

  • Micron ranges are typical targets for each method; grinders label their settings differently, so use the texture description to match.
  • "Fine", "medium" and "coarse" describe the bulk of the grounds; every grinder also makes some fines and boulders.
  • Adjust from the starting point by taste: sour or fast means finer, bitter or slow means coarser.

A Grinder That Covers the Full Range

Switching between espresso and drip means your grinder needs a wide, consistent adjustment range. These burr grinders handle fine to coarse without falling apart at either end.

Fellow Ode Gen 24.8

Fellow

Fellow Ode Gen 2 Review

A single-dose grinder built specifically for pour-over and filter coffee enthusiasts — not intended for espresso.

Turin DF64 Gen 24.8

Turin

Turin DF64 Gen 2 Review

An electric grinder with factory-aligned 64mm flat burrs and very low retention, built for single-dose espresso workflows.

Frequently Asked Questions

Quick answers before you buy.

Can I use one grind size for every brew method?

No — each method needs a different grind because contact time and filtration differ so much.

Espresso needs a fine grind because water passes through in seconds; French press needs coarse because grounds steep for minutes in a metal filter.

Do grinder numbers (like "18" or "4.5") mean the same thing across brands?

No — grinder click or dial numbers aren't standardized.

A setting of "20" on one grinder can be finer or coarser than "20" on another.

Use the texture and particle-size descriptions as your real reference, and treat your specific grinder's numbers as relative to itself.

My coffee tastes bitter — is that always a grind problem?

Bitterness from over-extraction is the most common cause and is usually fixed with a coarser grind, but water that's too hot, brewing too long, or too much coffee for the water can also cause it.

Change one variable at a time so you know what actually fixed it.

What grind size is best for pour-over?

Medium to medium-fine, similar to sand.

Go finer if the brew tastes sour or runs too fast, and coarser if it tastes bitter or drains slowly.

Adjust one step at a time.

What grind size is best for cold brew?

Coarse, like French press.

Cold brew steeps for many hours, so a coarse grind avoids over-extraction and makes the grounds easier to filter.

Is pre-ground coffee the right grind for my brewer?

Often only roughly.

Pre-ground bags are usually sized for drip machines and go stale faster than whole beans.

For espresso, moka pot or French press, grinding fresh gives you control.

Do I need a burr grinder to get the right grind size?

A burr grinder gives far more even particles than a blade grinder, and even particles extract more evenly.

See our burr vs blade grinder guide before buying.

How do I know whether to grind finer or coarser?

Taste decides. Sour, thin or weak points to grinding finer.

Bitter, harsh or dry points to grinding coarser. Change one step, brew again and compare.

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