The Brew Ratio
The brew ratio is the proportion of coffee to water — the single number that most directly sets how strong your cup will be. Written as coffee:water (e.g. 1:16), it tells you how many grams of water you pour per gram of coffee. Get this right and everything else — pour, bloom, grind — fine-tunes around it.
#How to Express It
1:16 means 16 g of water per 1 g of coffee. Some people flip it and say "16:1" or even "60 g/L." They all describe the same concentration.
For a single cup: 15 g coffee × 16 = 240 g water. A scale makes this trivial and repeatable — eyeballing scoops is the fastest way to an inconsistent cup.
#The "Golden Ratio" Range
The specialty world centers on a band rather than a single magic number:
| Ratio | Roughly | Cup character |
|---|---|---|
| 1:14–1:15 | Strong | Bold, heavy body, intense |
| 1:16 | Balanced | The common all-rounder default |
| 1:17–1:18 | Light | Delicate, tea-like, more clarity |
The oft-quoted 1:18 "golden ratio" comes from drip-machine standards. Modern pour-over brewers commonly run stronger — 1:15 to 1:16 — and there is no single correct value. Pick what tastes good to you.
#Ratio Sets Strength, Not Extraction
A crucial distinction: ratio controls strength (how concentrated the brew is, its TDS), while grind, temperature, and agitation control extraction yield (how much you pull from the grounds). You can have a strong-but-underextracted cup or a weak-but-overextracted one. The brewing control chart plots these two axes against each other.
#Adjusting in Practice
- Too weak / watery? Use more coffee (lower the water number, e.g. 1:16 → 1:15) before you reach for a finer grind.
- Too intense / muddy? Add water (1:15 → 1:17) for a lighter, cleaner cup.
- Changing dose? Keep the ratio fixed and scale both numbers together so the strength stays put — see Recipe Variables and Cup Outcomes.
Lighter roasts often reward a slightly higher coffee dose; see Roast Levels for Pour Over. When you scale up to a batch, the ratio holds even as bed depth and time change.
#Continue Reading
- Extraction Yield and Strength — why ratio and extraction are different dials.
- The Coffee Brewing Control Chart — strength vs extraction, mapped.
- How to Read a Coffee Recipe — where ratio sits in a recipe spec.
- Dialing In Grind Size — the other half of tuning a cup.