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CoffeeHQ

Foundational

Coffee-to-water ratio explained

What the coffee-to-water ratio is, why it varies by brewing method, and how to use it to control strength.

A chart of coffee-to-water ratios in grams per litre, one labelled range bar per brewing method, from Chemex at the weakest through to Turkish coffee at the strongest.
Illustration, not a photograph. Each bar is the range CoffeeHQ records for that method and the dot a typical value, not a target; espresso is far more concentrated and is not on this scale.

What the ratio means

The coffee-to-water ratio describes how much ground coffee is used relative to how much water passes through or sits with it. It is usually expressed as grams of coffee per litre of water, or as a simple ratio such as 1:16.

Why it differs by method

Immersion methods like French press and percolation methods like pour-over typically use different ratios because contact time, filtration and agitation all affect how much is extracted for a given ratio. Espresso uses a much more concentrated ratio because the brewing time is measured in seconds rather than minutes.

How to adjust it

Increasing the ratio (more coffee per water) increases strength but not necessarily extraction quality. If a coffee tastes weak, check ratio first; if it tastes correct in strength but sour or bitter, the grind size and contact time are usually the more relevant variables.

Related

Sources

  • SCA brewing and espresso standards — Specialty Coffee Association (SCA)