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Coffee Grind Size for AeroPress

Overwhelmed by all the grind size charts and ratios available on the web?

I know I was when I first started experimenting with the Aeropress!

But after loads of hits and misses, now I can brew great-tasting coffee consistently with the Aeropress. And a lot of it has to do with the grind size.

So, let’s talk about the optimal size coffee grounds for AeroPress

What Coffee Grind Sizes Work Best With an AeroPress?

After loads of experimenting, my go-to grind size for brewing with my favorite simple Aeropress recipe is a medium-fine grind.

Aeropress Grind Size

This makes a rich, smooth, and delicious AeroPress coffee, with particles about 0.5 mm in diameter (the size of table salt), slightly coarser than the grind used for making espresso and finer than the grind used for brewing coffee in a French press.

My second favorite Aeropress recipe is this faux espresso one. I use a fine espresso grind, but not as fine as you would use in a real espresso machine. Obviously, the pressure is not the same as an espresso machine, but it still works well.

Fine Ground Coffee

And still, there are more options to try.

One of the best things about the Aeropress is that you can try countless brewing recipes, each calling for:

  • Various grams of coffee, 
  • Grind sizes 
  • Different bloom and steep times, 
  • Stirring times, 
  • Plunging speed, 
  • Water temperature
  • Some even require a pre-heated brew chamber to keep the water temperature from dropping sharply initially. 
  • Oh, and did I mention that switching between paper and metal filters will also make a difference?

The only thing that doesn’t make a difference is whether you are using the standard or inverted method.

After you try a few basic recipes, you’ll also want to start experimenting.

There are 2 rules in general:

  1. If you like a more robust cuppa coffee, you’ll fare better with a grind size on the finer side. This is because a finer grind size provides a larger surface area for the hot water to extract, resulting in a stronger cup of joe. You don’t want to go extra fine, though, since you will have trouble pushing the plunger down.
  2. If you like your coffee to be more delicate and mild, you’ll want to go with a coarser grind so that there is less surface area for the hot water to interact with. Anything from medium to medium-coarse.

Extra-fine grind

Extra Fine Ground Coffee

Extra-coarse grind

Extra Coarse Ground Coffee

Why Is Coffee Bean Grind Size Important?

Ah, the age-old question, “Why is grind size important when it comes to brewing great coffee on the Aeropress (and any other brewing device)?” Let me explain.

You see, grinding your beans releases all of their flavorful oils, sediments, and aromas:

  • If they’re too coarsely ground, these flavors won’t be adequately extracted – resulting in a weak cup o’ joe.
  • On the flip side, if they’re overground, those same delicious compounds can become bitter or harsh tasting due to excessive exposure!

It’s like Goldilocks; not too fine but not too coarse – just right for that perfect balance of flavor extraction and complexity. And remember water temperature, too, as this plays an equally significant role in ensuring your brew tastes smooth on every sip.

But with that said, you should know that different grind sizes work better with different coffee-making devices. For example, an espresso will require more finely ground beans than an Aeropress or a French Press which requires a coarse grind for the long steep times. 

When it comes to making great coffee, there really is no one size fits all answer – but adjusting your grind settings and using the right equipment can make sure you get maximum flavor from your beans.

Blade vs. Burr Coffee Grinders for AeroPress

Blade and burr grinders are the two main types of grinders used to grind roasted coffee beans.

  • A blade grinder uses a sharp blade to chop the coffee beans into smaller pieces. This type of grinder is typically less expensive and easier to use, but it is less consistent in the size of the grounds it produces. You will have fine grind, medium grind, and even coarse grind sediments all in one, which does not make proper extraction possible.
  • A burr grinder, on the other hand, uses two rotating abrasive surfaces (burrs) to grind the beans into a more uniform size. This type of grinder is typically more expensive, but it produces more consistent grounds and allows for more control over the fineness of the grind.

I recommend you use a manual burr grinder with your Aeropress, and stay away from blade grinders altogether. You don’t need an electric grinder for an Aeropress.

Should You Use Pre-ground Coffee With AeroPress?

Using pre-ground coffee in an AeroPress is not a problem. You will likely get a cup of strong coffee since grocery store pre-ground coffee is typically a fine espresso grind.

Coffee Bags 1

However, grinding the coffee yourself will allow you to dial in the right coffee grind size for your brewing method and desired taste.

Besides, you should be aware that pre-ground coffee has a much shorter shelf life than whole beans and will lose its flavor more quickly, even if you store it properly.

Conclusion

The AeroPress is a versatile coffee maker that can make everything from a quick cup of coffee to full-bodied espresso. 

But how do you choose the right grind size for your AeroPress? The key is optimizing water flow and extraction time for the brew you are looking for. If your grind size is too coarse, you’ll end up with weak flavor; if it’s too fine, your brew will be bitter and over-extracted.

The ideal coffee grind size for AeroPress is medium-fine. Start there, and experiment by making incremental modifications.

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