Chemex Pour Over Coffee: Complete Brewing Guide

The Chemex is the most beautiful, most particular, and ultimately most rewarding pour over brewer you can own. Designed in 1941 and barely changed since, it makes the cleanest cup of any commercial dripper — but only if you grind it right, pour it right, and use the right filter. This is the full Chemex brewing recipe and the small adjustments that separate a great Chemex cup from a flat one.

Why Chemex makes such a distinctive cup

The Chemex's distinctiveness comes from two design choices: the heavyweight bonded filter (20–30% thicker than V60 paper) and the dripper's narrow neck. Together they slow the brew time to 4:30–5:30 (vs 3:00–3:30 for a V60) and filter out more fines and oils. The resulting cup is exceptionally clear, brighter than any French Press, and aromatically more focused than any other paper-filtered brew.

The trade-off is finickiness. Chemex needs a slightly coarser grind than V60 (the slow drain stalls easily with fine grind), a slower pour (the bed compresses with aggressive pouring), and a more thorough filter rinse (Chemex bonded filters carry more paper flavor than V60 filters). Once those three adjustments are dialed in, the Chemex is the most forgiving brewer in pour over — but the runway to "dialed in" is longer than for a V60.

The 6-cup Chemex recipe

This is the standard recipe for the most common Chemex model — the 6-cup Classic. It produces about 22 oz of finished coffee (2 mugs plus a refill). Scale up proportionally for the 8-cup model.

Variable	6-cup Chemex	8-cup Chemex
Coffee	40 g, medium-coarse grind	50 g, medium-coarse grind
Water	640 g at 205 °F (96 °C)	800 g at 205 °F (96 °C)
Ratio	1:16	1:16
Total brew time	4:30 – 5:30	5:00 – 6:00
Yield	About 22 oz (2.5 mugs)	About 27 oz (3 mugs)

Step-by-step

Heat water and place the filter. Bring water to a boil. Place the Chemex filter in the dripper with the three-layer side facing the spout. (The three-layer side supports the brew weight; the single-layer side prevents brew from splashing out of the spout.)
Rinse the filter thoroughly. Pour 200–300 g of hot water through the empty filter into the Chemex. Discard the rinse water by tilting the Chemex away from the spout. Chemex filters carry more papery flavor than other pour over filters, so rinse more generously than you would for a V60.
Weigh and grind the coffee. 40 g of whole beans, ground to a medium-coarse setting — one click coarser than your V60 setting. Add to the rinsed filter and gently shake the Chemex to level the bed.
Tare the scale and start the timer. Place the Chemex on the scale, tare to zero, and start a timer.
Bloom (0:00 – 0:45). Pour 80 g of water (twice the coffee weight) onto the grounds in a slow circular motion, starting at the center and spiraling outward. Wait until 0:45. The bed should rise and bubble.
First main pour (0:45 – 2:00). Pour slowly to 400 g total in concentric circles, avoiding the filter walls. This pour should take about 75 seconds — much slower than a V60 pour.
Second main pour (2:00 – 3:00). Pour to 640 g total in the same circular pattern. The bed should still have water on top when you finish.
Drawdown and serve (3:00 – 5:30). Let the Chemex finish draining. Total brew time should land in the 4:30–5:30 window. When done, remove the filter (use the wood collar to lift it), swirl the Chemex to even out the cup, and pour into mugs.

Chemex-specific pro tips

Grind one click coarser than V60. Chemex's thick filter drains slower, so a V60-fine grind will stall a Chemex brew at 6+ minutes.
Pour total time should be about 3:00. Sum the bloom plus both pours — slower than V60's ~2:15, faster than the drawdown.
If the brew stalls, the most common cause is grind too fine. Less common: too much filter rinse water still in the carafe (it doesn't actually slow drainage but can make the brew look slower).
Lift and pour just before drinking. The Chemex's narrow neck holds the brew warm; serving immediately into pre-warmed mugs preserves the cup's brightness.
Replace the filter every brew. Reusing a Chemex filter is the surest way to taste a rancid cup.

Chemex grind size

Medium-coarse — between sea salt and table salt. Coarser than V60, finer than French Press. The slow Chemex drawdown rewards a coarser grind than other pour over methods; a too-fine grind will turn a 5-minute brew into an 8-minute slog.

Grinder	Chemex setting
Baratza Encore	20–24
Baratza Virtuoso+	24–28
Comandante C40	24–28 clicks
1Zpresso JX	90–110 clicks
Fellow Ode (Gen 2)	7–8

Adjusting grind by brew time

Brew finishes in under 4:30 → grind one click finer next time. Brew was under-extracted.
Brew takes over 6:00 → grind one click coarser. Brew was over-extracted.
Brew tastes good but is in the 5:30–6:00 range → leave it. The slow end of the window is fine if the cup tastes balanced.

Best coffee for Chemex

The Chemex flatters bright, complex single-origin coffees more than any other brewer — the clean filtration shows off origin character with more clarity than a V60 or Kalita Wave. Three picks from our lineup:

Banko Gotiti — Ethiopia Yirgacheffe washed. Apricot, bergamot, floral, tea-like body. The textbook Chemex coffee.
Argelia Cauca — Colombia washed. Toffee, balanced sweetness, soft acidity. A versatile Chemex pick that holds up to the dilution at the end of the brew.
Finca Tacacal — Costa Rica natural. Syrupy body, wine-like, complex. A more adventurous Chemex choice — the natural process gives it body that Chemex normally strips away, producing a uniquely-balanced cup.

Chemex filters

Use original Chemex bonded filters, sized to your Chemex model. The 6-cup and 8-cup models both use the standard FS-100 (square) or FC-100 (circle) filters. See the dedicated Chemex Coffee Filters guide for sizing, bleached vs unbleached, and folding instructions.

Two things worth repeating from the filter guide: rinse generously (200–300 g of hot water — more than you'd use for a V60), and orient the three-layer side toward the spout. Both matter for the cup.

Chemex troubleshooting

Brew stalls or takes over 6:00

Grind too fine — coarsen by one or two clicks.
Pour too aggressive — slow the pour and use concentric circles.
Filter may be folded wrong-side around (three-layer side should face spout).

Brew finishes too fast (under 4:00)

Grind too coarse — finer by one or two clicks.
Not enough coffee in the bed — check the 1:16 ratio.
Filter may be defective — rare but possible with older filter stock.

Cup tastes papery

Rinse the filter more thoroughly — 200–300 g of hot water before brewing.
If using unbleached filters, switch to bleached (oxygen-bleached, chlorine-free).

Cup tastes bitter or harsh

Grind too fine.
Brew time over 6:00.
Water too hot — drop to 200 °F instead of 205 °F.

Cup tastes sour or thin

Grind too coarse.
Brew time under 4:30.
Ratio too loose — tighten from 1:16 to 1:15.

Chemex vs V60

The two most-popular pour over drippers, side by side:

Filter: Chemex bonded heavyweight (slower drain, cleaner cup) vs V60 lighter cone paper (faster drain, slightly more body).
Grind: Chemex medium-coarse, V60 medium-fine. One click difference.
Brew time: Chemex 4:30–5:30, V60 3:00–3:30.
Cup profile: Chemex is the cleanest, most aromatic, most clearly defined pour over cup commercially available. V60 is slightly more textured with more body and slightly faster aromatic release.
Capacity: Chemex brews 2–3 mugs at a time and doubles as the serving carafe. V60 makes one or two cups per brew.
Forgiveness: Chemex is less forgiving of grind size (the slow brew amplifies grind mistakes) but more forgiving of pour technique (the larger reservoir averages out pour errors).

For tasting single-origin light roasts shared between two drinkers, Chemex is hard to beat. For solo brewing where speed and ease matter more than capacity, V60 is the better fit.

Chemex pour over coffee FAQ

What's the Chemex coffee-to-water ratio?

1:16 — that's 40 g coffee for a 6-cup Chemex (640 g water, ~22 oz finished coffee) or 50 g coffee for an 8-cup (800 g water, ~27 oz). Adjust to 1:15 for a stronger, denser cup (darker roasts respond well) or 1:17 for a cleaner, brighter cup (lighter roasts respond well).

How long should a Chemex brew take?

Total brew time should land between 4:30 and 5:30 for a 6-cup Chemex, or 5:00 to 6:00 for an 8-cup. Faster brews are under-extracted (sour, thin); slower brews are over-extracted (bitter, harsh). Adjust grind size to land in the target window — a coarser grind speeds up the brew; finer slows it down.

What grind size for Chemex?

Medium-coarse — about the texture of sea salt. One click coarser than a V60 setting on the same grinder. Chemex's heavy bonded filter drains more slowly than V60 paper, so a coarser grind keeps the brew time in the 4:30–5:30 window. Too fine and the brew stalls past 6 minutes.

Why does my Chemex brew stall?

Three likely causes: grind too fine (most common — coarsen by one or two clicks), pour too aggressive (slow the pour and use gentle concentric circles), or filter folded wrong-side around (the three-layer side should face the spout, not away from it). If grind and pour are both correct, check the filter orientation.

Do I need to rinse a Chemex filter?

Yes — and more thoroughly than other pour over filters. Chemex bonded paper is 20–30% thicker than V60 paper and carries more papery flavor. Pour 200–300 g of hot water through the empty filter before adding coffee, discard the rinse, and the Chemex is pre-warmed and ready. Skip this step and the first sip tastes like wet cardboard.

Can you make a single cup in a Chemex?

You can, but the Chemex is happiest making at least 2 mugs at a time. The geometry of the brewer — wide reservoir, narrow neck — doesn't reduce well to single-cup volumes. For one cup, a V60 02 produces a noticeably better single-cup brew than a 3-cup Chemex. Use the Chemex for multi-cup brews.

Is Chemex coffee better than V60?

Different, not better. Chemex makes the cleanest, most aromatic cup; V60 makes a slightly more textured, faster-aromatic cup. Chemex scales better to multi-cup brews; V60 is more forgiving and quicker to dial in for single cups. For a Sunday brunch brew shared between two people, Chemex wins. For a Monday morning solo cup, V60 is the easier choice.

What's the best coffee for Chemex?

Light-to-medium-roasted single-origin coffees with bright, complex flavor profiles. From our lineup, Banko Gotiti is the textbook Chemex pick — Ethiopian Yirgacheffe washed, apricot and floral, tea-like body. Finca Tacacal is a more adventurous Chemex choice with wine-like complexity.

Where to go next

Pour Over Coffee Guide — the full hub with ratios, equipment, advanced technique
Chemex Coffee Filters Guide — sizing, bonded vs unbleached, folding
Pour Over for Beginners — the first-brew recipe
Pour Over Coffee Measurements — conversion charts
Shop fresh-roasted coffee — Chicago-roasted, shipped within 24 hours