Find the perfect coffee-to-water ratio for any brewing method. Whether you prefer pour over, French press, AeroPress or espresso, get precise measurements every time.
The ratio of coffee grounds to water is the single most important variable in brewing. The Specialty Coffee Association (SCA) established a recommended range of 1:15 to 1:18, with 1:16 as the golden standard. This ratio directly controls Total Dissolved Solids (TDS) and extraction yield. Too little coffee produces a weak, under-extracted cup with sour notes. Too much coffee leads to over-extraction, resulting in bitterness and astringency. Our calculator uses SCA-validated ratios tailored to each brewing method, so you get a balanced cup every time regardless of whether you brew with a V60, Chemex, AeroPress, French press, or espresso machine.
Different brewing methods require different ratios because of how water interacts with the coffee grounds. Immersion methods like French press use a 1:15 to 1:17 ratio because the grounds steep in water for the full brew time. Percolation methods like pour over (V60, Chemex) work best at 1:15 to 1:16 because water passes through the bed and extracts more efficiently. Espresso uses an extremely concentrated 1:2 ratio (dose to yield by weight) with pressurized water at 9 bars. Cold brew requires a strong 1:5 ratio because cold water extracts much less efficiently than hot water, and the concentrate is typically diluted before serving.
For repeatable results, always measure by weight using a digital kitchen scale accurate to 0.1 grams. Volume measurements (tablespoons, scoops) are unreliable because grind size, roast level, and bean density all affect how much coffee fits in a scoop. A tablespoon of finely ground dark roast weighs more than a tablespoon of coarsely ground light roast. Water should also be measured by weight: 1 millilitre of water weighs exactly 1 gram. Investing in a basic coffee scale (available for under 15 dollars) is the single best upgrade you can make to your home brewing setup.
Source: https://sca.coffee/research/brewing-best-practices
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