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Brew ratio is the weight of coffee relative to the weight of water. With extraction held roughly constant, more coffee usually makes a stronger cup and more water a lighter one. Strength is how concentrated the drink is. Extraction yield is how much of the dose was dissolved. Those are not the same measurement.
When you learn pour-over or read a brew note, you often see 1:16 or 1:17. This article is about coffee-to-water by weight, and how that differs from how strong the cup tastes.
A ratio of 1:16 usually means one part coffee to sixteen parts water by weight. Grams keep it clear: 15 grams of coffee with 240 grams of water is 1:16.
It is not a bean and not a brewer. Filter and immersion methods both use the idea. Espresso has its own dose-to-beverage ratios, and those numbers are not the same as filter 1:16. Do not apply 1:16 directly to espresso.
Colloquial “strong” often mixes dark roast and heavy body into one word. Perfect Daily Grind notes that extraction is how much soluble material moves from the grounds into the water, while brew ratio is the more direct way to change the concentration of the coffee.
If the dose is extracted to a similar degree, more coffee relative to water usually makes a stronger drink; more water usually makes a lighter one. But grind, contact time, and temperature also change extraction efficiency, so strength changes with them.
The grind-size page already treats brew ratio as the main lever for concentration. This page unpacks that, so you can change one variable at a time and see roughly how brew ratio and grind size change the flavor of the coffee.
Extraction is the process of water drawing soluble material out of the coffee. Strength is how concentrated the finished liquid is. Extraction yield is the share of the dose that dissolved. You can brew a strong cup that is still under-extracted, or extract thoroughly and then dilute the drink with more water.
Over-extraction, under-extraction, and why sour or bitter cups are not always brewing errors belong on over-extraction and under-extraction.
The 2015 SCAA Golden Cup recommendation for filter coffee is 55 grams of coffee per liter of water, plus or minus 10%. As a weight ratio that sits roughly between 1:16.5 and 1:20; 55 grams to 1,000 grams of water is close to 1:18. The same document puts brew strength near 1.15% to 1.35% TDS from an 18% to 22% extraction yield.
That is a filter reference from that period, not a requirement for every dripper and not proof that a cup tastes good. Perfect Daily Grind quotes a common example around 1:16. A 2021 filter study found black-coffee liking spread across a wide range of strengths and yields, in two preference clusters.
This page is not a single recipe. Weigh the coffee and the water, then change one variable when the cup is stronger or lighter than you want.
No. Ratio is how much coffee and water you start with. Strength is how concentrated the finished drink is. A higher coffee dose usually makes a stronger cup, but grind, time, and temperature still change how thoroughly the dose is extracted.
No. The SCAA Golden Cup filter recommendation is 55 g coffee per liter of water, plus or minus 10%, roughly 1:16.5 to 1:20. About 1:16 is a common example. Espresso uses a different ratio language; see the espresso page.
Change one variable at a time if you want to know what moved. Ratio is the more direct way to shift strength. Grind more often changes flow and extraction efficiency. Details are on the grind-size page.
A spoon measures volume. Darker roasts weigh less, so the same spoonful is less coffee. A scale is the stable way to keep a weight ratio.
No. Some people prefer a lighter cup. A 2021 filter study also found black-coffee liking spread across a wide range of strengths.