Coffee glossary
Brew Ratio
Also known as: coffee-to-water ratio
The proportion of coffee to water, written like 1:16 — one gram of coffee for every sixteen grams of water.
Most filter methods taste good between about 1:15 and 1:17. Espresso uses much tighter ratios, typically 1:2 (for example 18 g of coffee yielding 36 g of liquid). Changing the ratio changes strength; changing the grind changes extraction.