To grind coffee beans well at home, start by matching the grind size to your brewing method. Use a burr grinder where possible, grind shortly before brewing, then adjust one step at a time according to taste and brew time.
Grind size is one of the most influential and most commonly misunderstood variables in home brewing.
Why Coffee Grind Size Matters
Grind size controls how much surface area of the coffee is exposed to water, which greatly affects how quickly soluble compounds are extracted.
Espresso generally uses a fine grind because it extracts a concentrated drink over a short period. A target such as 25–30 seconds can be a useful starting point for some recipes, but taste, dose and beverage yield matter more than hitting one universal time.
Cold brew steeps for much longer, so a coarser grind usually makes filtration easier and helps prevent an overly heavy, silty or unbalanced result.
How to Grind Coffee Beans at Home
Choose Your Brewing Method
Grind size isn't universal. It depends entirely on what you're brewing, so decide your method first.
Weigh the Beans
Weighing before grinding makes a brew much easier to repeat than measuring by scoop. Coffee beans vary in density, so the same volume can contain a different mass of coffee.
Set the Grinder
Grinder numbers are not universal. “Setting 10” on one grinder can be a completely different grind size from “setting 10” on another.
Use visual texture and brew performance as your starting reference, then adjust for your particular grinder from there. Even on the same grinder, a new coffee may need a different setting, since roast level, density and age all affect how beans grind and extract.
Grind Just Before Brewing
Ground coffee generally loses aroma and flavour faster than whole beans, since more surface area is exposed to air. Grind immediately before brewing where practical.
If you must pre-grind, grind only the amount you expect to use over a short period rather than preparing an entire bag at once, and keep it tightly sealed.
Brew, Taste and Adjust
Taste the result and adjust one variable at a time. Sour, thin or unusually fast brews often benefit from a finer grind, while bitter, dry or unusually slow brews may benefit from a coarser grind.
Grind isn't the only variable. Ratio, water temperature and contact time all play a part too, but it is usually one of the most practical places to begin.
Coffee Grind Size by Brewing Method
| Method | Grind Size | Practical Description |
|---|---|---|
| Cold Brew | Coarse | Large, clearly defined particles |
| French Press | Medium Coarse | Similar to coarse sea salt |
| Hario Switch | Medium Coarse, as a base setting | Adjust depending on whether the recipe is immersion, pour-over or hybrid |
| V60 | Medium Coarse | Between coarse and medium |
| Chemex | Medium | Similar to regular sand |
| AeroPress | Medium, as a starting point | Recipe-dependent. Varies with steep time, pressure and filter type |
| Moka Pot | Medium Fine | Finer than pour-over, coarser than espresso |
| Espresso | Fine | Finer than table salt, but not powdery like flour |
All texture comparisons are approximate references rather than precise measurements. Taste and brew performance are more reliable guides than appearance alone.
Choosing the right grind is only one part of espresso preparation. The coffee itself matters just as much. Read our guide to the best coffee beans for espresso.
Burr vs Blade Coffee Grinders
Burr grinders crush beans between two surfaces to a more consistent size, while blade grinders chop beans unevenly, producing a mix of larger chunks and fine powder in the same batch.
A blade grinder can work as a temporary or budget option, but its uneven particle sizes make repeatable brewing more difficult than with a burr grinder.
How to Tell if Your Grind Is Wrong
Try a finer grind.
Try a coarser grind.
Check grind consistency, technique, water distribution and equipment.
Change one variable at a time. If you adjust grind, dose and time all at once, you won't know which change actually fixed or caused the problem.
How to Grind Coffee Without a Grinder
If you don't have a grinder yet, these methods will get you brewing, though none match the consistency of a proper burr grinder.
Mortar and Pestle
Work in small batches and crush gradually. It offers more control than a blade appliance, but producing consistently sized particles can still take time and effort.
Rolling Pin
Place the beans in a sturdy sealed bag, wrap it in a tea towel, then crush them gradually with firm but even pressure.
Blender or Food Processor
Use short pulses and shake between pulses to redistribute the beans. The result will be uneven, so consider this a temporary solution rather than a substitute for a grinder.
How to Use Our Brew Calculator
Our Brew Calculator has recipe recommendations from our founder, Abu Bakr.
It covers eight methods: V60, Espresso, French Press, Chemex, AeroPress, Cold Brew, Hario Switch and Moka Pot.
Select your method, how many cups or shots you're making, and a strength preference (Mild, Balanced or Bold), and it returns a full recipe including grind size, coffee weight, water amount, ratio and total brew time.
These are developed as practical starting recipes for home brewing rather than fixed rules.
How to Choose a Coffee Grinder
A few things matter most when choosing between grinders: hand or electric, how much you'll grind at once, and how much control you want over the settings.
| Grinder | Type | Best Suited To | Important Limitation |
|---|---|---|---|
| Hario Mini Mill Plus | Hand, ceramic burrs | A compact, entry-level option for home brewing | Compact size means smaller capacity, worth considering if you often grind for several people at once |
| Hario Skerton N | Hand, ceramic burrs, 100g | Grinding more at once without switching to electric | Marketed mainly for pour-over and everyday brewing rather than repeated fine espresso dialling |
| Hario Smart G | Hand, ceramic burrs, washable, 24g | Portability and single-serve precision | The smallest capacity of these manual grinders, making it better suited to single servings than larger batches |
| Timemore GO | Electric, rechargeable, 15g per cycle | Rechargeable electric grinding for small single-serve batches | Larger batches require repeated grinding cycles, and the grinder relies on a rechargeable battery |
| Comandante C40 | Hand, stainless steel | Wide adjustment range for multiple brewing methods | It reaches a wide grind range, but hand-grinding fine enough for consistent espresso takes more effort than an electric grinder |
Browse the coffee grinder range to compare the options currently available from Red Berry Roasters.
Frequently Asked Questions
How fine should coffee be ground?
It depends entirely on your brew method, from coarse for cold brew to fine for espresso. Use our Brew Calculator for a specific starting point.
Can I grind coffee in a blender?
Yes, using short pulses and shaking between them, though the result will be less consistent than a proper burr grinder.
Is a burr grinder really better?
For consistency and repeatability, generally yes. Burr grinders crush beans to a more consistent size, while blade grinders produce a more uneven mix in the same batch.
Why does my coffee taste sour?
It is often a sign that the grind is too coarse for the method, although ratio, water temperature, freshness and other variables can also play a role.
Why does my coffee taste bitter?
It is often a sign that the grind is too fine, although over-extraction can result from other variables too. Grind is usually one of the most practical places to start adjusting.
Can one grinder work for espresso and French press?
Yes, as long as it has a wide enough adjustment range. Check the grind range before buying if you plan to brew multiple methods.
Should coffee be ground immediately before brewing?
Ideally, yes. Ground coffee generally loses aroma and flavour faster than whole beans because more surface area is exposed to air.
Choose the Right Grind for Your Brew
Start with the grind recommended for your brewing method, keep the dose and water consistent, and adjust one step at a time according to taste and brew speed.
Use our Brew Calculator for a complete starting recipe, or explore the grinder range if inconsistent grounds are limiting your results. Once you understand these variables, learning how to grind coffee beans at home becomes a process of controlled adjustment rather than shooting in the dark.