Coffee Grind Size Guide — How to Choose the Perfect Grind for Every Brew Method
If you have ever wondered why your cafetiere coffee tastes muddy or your espresso runs through in 5 seconds, the answer is almost certainly grind size. Getting the right grind is the single biggest upgrade you can make to your home coffee — and it costs nothing to fix once you know what you are doing.
This guide covers everything a UK home brewer needs to know about coffee grind sizes: which setting works for which brew method, how to dial in a new bag of beans, and which grinders are worth your money.
Why Grind Size Matters
The size of your coffee grounds directly controls how fast water extracts flavour. Too fine, and water struggles to pass through — you get over-extracted, bitter coffee. Too coarse, and water rushes past without picking up enough flavour — weak, sour, under-extracted coffee.
Every brew method needs a specific grind size because each method has a different contact time between water and coffee. Espresso has roughly 25 seconds of contact and needs a fine grind. French press has 4 minutes and needs a coarse grind. Simple.
Burr vs Blade Grinders
Before we talk grind settings, a quick word on hardware. There are two types of coffee grinder, and the difference matters enormously.
Blade grinders (the cheap spinning-blade type) chop beans unevenly — you get dust mixed with boulders. Impossible to get consistent extraction. Burr grinders crush beans between two abrasive surfaces to a uniform size. They are the only way to get repeatable, dialled-in results.
Complete Grind Size Guide for Every Brew Method
Extra Fine — Turkish Coffee
Finer than espresso — like powdered sugar. Only used for Turkish or ibrik coffee, where the grounds settle at the bottom of the cup. Not common in UK homes, but worth knowing.
Fine — Espresso
Fine, like table salt. Essential for espresso machines and stovetop moka pots. The pressure of an espresso machine forces water through tightly-packed fine grounds in 25-30 seconds. If your espresso runs in 10 seconds, grind finer. If it drips, grind coarser.
Bean-to-cup machines like the Philips 5400 Series have built-in ceramic burr grinders that auto-adjust for espresso. But if you are using a separate grinder, start at a fine setting and dial in from there.
Medium-Fine — AeroPress and Moka Pot
Slightly coarser than espresso — like fine sand. Perfect for the AeroPress Original (especially the inverted method) and stovetop moka pots. With AeroPress, medium-fine gives you a clean, bright brew in under 2 minutes — ideal for a quick morning coffee.
Medium — Pour Over, V60 and Filter Machines
Medium grind feels like coarse sand. This is the most versatile size and works for most pour-over cones (Hario V60, Kalita Wave), drip filter machines (Melitta, Moccamaster), and cafetiere if you prefer a cleaner brew.
Use a coffee scale with timer to nail your pour-over technique. Aim for a 1:16 coffee-to-water ratio with a 3-minute total brew time. If it finishes too fast, grind finer. Too slow, grind coarser.
Medium-Coarse — French Press / Cafetiere
Medium-coarse looks like rough sea salt. This is the classic cafetiere grind. The mesh filter on a French press lets fine particles through, so you need a consistently coarse grind to avoid sludge.
The Mini Manual Coffee Grinder with 40 Adjustable Settings is great for dialling in the perfect cafetiere grind on a budget — just set it to medium-coarse and you are good to go.
Coarse — Cold Brew
Coarse grind, like breadcrumbs. Cold brew steeps for 12-24 hours, so you need big particles to prevent over-extraction. A coarse grind gives smooth, chocolatey cold brew with minimal bitterness. Perfect for summer — see our guide to best coffee beans for cold brew.
How to Dial In a New Bag of Beans
Every bag of beans behaves differently — freshness, roast level, and origin all affect grind. Here is a simple process:
- Start at the recommended setting for your brew method (see table above)
- Brew a test cup and time it — espresso should take 25-30 seconds, pour-over about 3 minutes
- If bitter or slow then grind coarser (water is struggling to pass through)
- If sour or fast then grind finer (water is rushing past)
- Adjust one step at a time and re-test
A digital coffee scale with integrated timer makes this process 10x easier — no more guessing brew times.
Grind Size Cheat Sheet
| Grind Size | Looks Like | Brew Method | Brew Time |
|---|---|---|---|
| Extra Fine | Powdered sugar | Turkish / Ibrik | 3-4 min (no filter) |
| Fine | Table salt | Espresso, Moka Pot | 25-30 sec / 3-4 min |
| Medium-Fine | Fine sand | AeroPress, V60 | 1.5-2 min |
| Medium | Coarse sand | Pour Over, Filter Machine | 3-4 min |
| Medium-Coarse | Rough sea salt | Cafetiere / French Press | 4 min |
| Coarse | Breadcrumbs | Cold Brew | 12-24 hours |
Products Mentioned in This Guide
- Baratza Encore ESP Electric Burr Grinder — Best all-round electric grinder for UK homes
- Timemore C2 Manual Grinder — Best budget manual burr grinder
- MOVNO Portable Cordless Burr Grinder — Great for travel and small kitchens
- Mini Manual Coffee Grinder with 40 Settings — Budget pick with 40 grind settings
- AeroPress Original Coffee Maker — Perfect for medium-fine grind brewing
- Coffee Scale with Timer — Essential for dialling in your grind
- Philips 5400 Series Bean-to-Cup Machine — Built-in ceramic grinder for effortless espresso
Frequently Asked Questions
Final Verdict
Getting your grind size right is the cheapest, fastest upgrade to your home coffee. You do not need an expensive grinder — a consistent burr grinder (manual or electric) plus a few minutes of dialling in will produce better coffee than a £1000 machine running the wrong grind.
Start with the cheat sheet above, adjust by taste, and keep a coffee scale with timer handy to take the guesswork out. For our full roundup of the best grinders on the market, read our Best Coffee Grinders UK 2026 guide.
Sam Roberts writes about coffee machines, beans and brewing gear for Coffee Nerds.
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