Coffee-to-water ratios for every brewing method
A brewing ratio is the single most repeatable variable in coffee. Grinds drift, kettles cool, beans age — but 30 grams of coffee into 500 grams of water is the same recipe every single morning. This reference collects the ratio ranges used by each major method, anchored wherever possible to the equipment maker's or roaster's own published recipe rather than forum folklore.
Key takeaways
- Filter methods cluster at 1:15 to 1:17 — the SCA Golden Cup standard for drip is 55 g/L, roughly 1:18.
- Immersion methods (French press, AeroPress) run slightly tighter, 1:12 to 1:16, because no water passes through unspent grounds.
- Espresso is a different sport: near 1:2 by weight, not by volume.
- Cold brew concentrate is brewed at roughly 1:5, then diluted 1:2 to 1:3 to serve.
- Whichever you use, weigh it — see our ratio calculator for instant gram conversions.
The full ratio table
| Method | Typical range | Calculator standard | Anchor source (official) |
|---|---|---|---|
| V60 / pour-over | 1:14–1:17 | 1:15 | Hario global V60 pages (20 g → 300 g, 2 cups) |
| Chemex | 1:15–1:17 | 1:16 | Chemex distributor guide (37.5 g → 600 g) |
| Auto drip | 1:15–1:18 | 1:17 | Counter Culture (30 g → 500 g); SCA 55 g/L ≈ 1:18 |
| French press | 1:13–1:18 | 1:15 | Stumptown 56 g → 850 g; Blue Bottle 30 g → 350 g |
| AeroPress | 1:11–1:16 | 1:14 | AeroPress scoop method; Counter Culture 1:12 inverted |
| Moka pot | 1:8–1:12 (typical) | 1:10 | Bialetti valve + full-basket rule (cross-referenced) |
| Cold brew (concentrate) | 1:4–1:8 | 1:5 | Toddy instruction sheet (340 g → 1.65 L) |
| Espresso | 1:1.5–2.5 | 1:2 | Counter Culture 18 g → 36 g; illy 7 g single |
Sources, fetched 2026-11-16 (nofollow): Hario V60 · Fellow pour-over · Counter Culture ratios · Stumptown French press · AeroPress · Toddy · illy.
Where 1:18 comes from: the SCA anchor
The Specialty Coffee Association's Golden Cup standard — the reference point for auto-drip coffee — specifies 55 grams of coffee per litre of water, with a tolerance of ±10%. That works out to a ratio span of roughly 1:16.7 to 1:20 with a midpoint near 1:18, classically paired with an 18–22% extraction yield and a brewed strength of 1.15–1.35% total dissolved solids. Our Golden Cup explainer covers the history and the caveats; the practical takeaway is that any ratio between 1:15 and 1:18 is inside somebody's official recommendation for filter coffee.
Why the ranges differ by method
Pour-over is a percolation method: clean water keeps passing over the grounds, so it extracts efficiently and tolerates more water per gram. Immersion methods saturate the grounds in a fixed amount of water that becomes steadily weaker as a solvent, so recipes run tighter — Counter Culture recommends about 1:15 for immersion versus 1:17 for drip, and that two-point gap shows up across roaster guides. Espresso compresses everything into 25–30 seconds under ~9 bar of pressure (per illy's preparation guide), which is why its ratio looks nothing like the others. And cold brew trades heat for time, so a strong concentrate at 1:5 can taste mellow once diluted 1:2 with water or milk — the approach Toddy's own instruction sheet has used for decades.
Reading a ratio in practice
"1:15" means one part coffee to fifteen parts water, by weight. Working from the water side: 500 g of water at 1:15 needs 500 ÷ 15 = 33.3, call it 33.5 g of coffee. Working from the coffee side: with 22 g left in the bag, 22 × 15 = 330 g of water. Both directions are one multiplication or division — the reason we built a calculator is not the arithmetic but the unit conversions, cup-count scaling and bloom math that pile on top of it.
Two habits make ratios bulletproof. First, tare the scale with the brewer on it and weigh everything, including the water you pour. Second, change one variable at a time — if Tuesday's cup is weak, fix the ratio before touching the grind. Our strength-adjustment guide walks through the decision tree.
Frequently made mistakes
The classic ratio errors: counting the bloom as extra water (it isn't — it is part of the total), using a "cup" that is really a mug (coffee standards treat a cup as 5–6 fl oz, not 12), and measuring coffee by volume, which swings several grams with bean density. We dissect all of them in seven ratio mistakes almost everyone makes, and our scale vs scoop comparison shows the measurement error in numbers.
Ranges, not laboratory constants
Roasters publish recipes that suit their roast style, and taste varies. A dark-roast French press at 1:17 may taste thin while a light-roast at 1:13 tastes balanced. Use these ranges as starting points and let your palate make the final call.
Related reading
- Coffee ratio calculator — all of this table, computed
- V60 pour-over guide — a 1:15 recipe pour by pour
- French press guide — 4 minutes at 1:15
- Espresso basics — why 1:2 by weight matters