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Kingrinder P2 for AeroPress

The tinkerer's favourite — a syringe-like plunger that's nearly foolproof, endlessly hackable and travels anywhere. Two minutes, a rinse, and a cup that's whatever you want it to be.

Kingrinder P2's setting

Clicks
40
Grind size
400–700 µm
Grind descriptor
Medium-fine

These settings are consensus values computed from 2 independent sources (manufacturer manuals, reference charts and our micron model), monitored daily for changes.

Overview

Ours 1:14·15 g·210 g·85 °C·Medium-fine · 400–700 µm·3:05 Make it yours

Brew with us

AeroPress

Grind Medium-fine 400–700 µm
Ratio 1:
Dose g
Water g
Water temp °C
Total time 3:05

0:00 Timer
Flow
Weight
STEP 1 / 8 0:00 / 0:00

Notes

Ninety seconds is our everyday number — push it toward two minutes for something richer, or pull it back for a cleaner, tea-like cup. Press slowly; forcing it just stirs up bitterness at the end.

Behind every step

  1. 1Weigh beans

    0:05

    Weighing instead of scooping is the only way to repeat a brew — beans differ in density and roast, so a scoop of one is not a scoop of another. Fix the dose and every other variable finally means something.

  2. 2Grind

    0:15

    The AeroPress is the most forgiving method here, which is why its range is so wide. Medium-fine with a short steep gives something espresso-adjacent; go coarser and steep longer for a cleaner, tea-like cup.

  3. 3Add the grounds

    0:10

    Coffee and brewer finally meet, and it is worth its own beat rather than a clause in another step: the filter is rinsed, the kettle is hot, and until the grounds are in there is nothing to brew. Give the brewer a tap to level the bed — a bed sitting at an angle sends the first pour down the low side and extracts unevenly from there on.

  4. 4Add water

    0:15

    Immersion brewing extracts by contact rather than pressure, so every ground needs to be wet at the same moment. Pour with enough energy to sink the floaters — dry pockets simply never brew.

  5. 5Stir

    0:10

    A stir breaks up the dry clumps and floating crust that water alone can't wet. It's the cheapest consistency fix in immersion brewing — just keep it gentle and brief, since agitation also speeds extraction.

  6. 6Steep

    1:30

    Ninety seconds is the everyday sweet spot — long enough for sweetness, short enough to stay clean. The AeroPress steeps under no pressure, so time and grind set the strength, not how hard you press.

  7. 7Press

    0:30

    The plunger separates grounds from liquid — it isn't squeezing out more coffee. Push slowly and evenly; forcing it drives fines through the mesh and stirs up bitterness right at the end.

  8. 8Enjoy

    0:10

    Coffee keeps changing as it cools: aromatics fade, acidity sharpens and sweetness comes forward. Drink it soon after brewing, and taste it as it drops in temperature — that's how you learn what to adjust next time.

Fix it by taste

The AeroPress is forgiving, so pick a lane. For an espresso-adjacent shot, go fine with a ~1-minute steep; for a clean, tea-like cup, go coarser and steep longer. Whatever you do, press slowly and evenly — the plunge separates the grounds, it doesn't squeeze out more coffee.

  • Bitter, plunger fights back
    Grind too fine / pressing too hard
    Fix · Coarsen a step and press slowly — force adds bitterness, not strength
  • Weak and sour
    Under-extracted
    Fix · Grind finer or steep a little longer
  • Gritty or muddy
    Fines through the filter
    Fix · Use a paper filter and grind a touch coarser
  • Inconsistent cup to cup
    Timing drift
    Fix · Keep a timer and repeat the same steep

What you need

Just the AeroPress, paper (or metal) filters, and any grinder. It's the best travel and single-cup brewer there is; a scale helps but isn't essential.

Beans & roast

Anything goes — it flatters everything from bright light roasts to chocolatey darks. Fresh grounds, as always, taste best.

Variations to try

  • Inverted

    Flip it to steep without dripping, then attach the cap and press

  • Espresso-style

    Fine grind, short steep, firm press for a concentrated base

  • Americano

    Brew strong and top with hot water

AeroPress FAQ

Why is my AeroPress bitter?

Usually too fine a grind or pressing too hard. Coarsen a step and press slowly and steadily — extra force adds bitterness, not extraction.

Standard or inverted method?

Both work. Inverted steeps without dripping so you control timing precisely; standard is simpler and less tippy. Use whichever you find repeatable.

Metal or paper filter?

Paper gives a cleaner cup; metal lets through more oils and body. Try both — the AeroPress makes swapping easy.

Grinders dialed for this method

Full grind chart →
Ratio calculator Grind settings for 57 grinders Make your own version Alpha