What Coffee-to-Water Ratio Should Pour-Over Use?

A 1:15 coffee-to-water ratio is the recommended starting point for pour-over, meaning 1 gram of grounds to 15 grams of water. The ratio decides how concentrated or weak the cup turns out, so it is the first variable to set. Staged pouring is then used to control how the extraction develops through the brew.

The SCA Golden Cup range runs 18 to 22 percent extraction yield and 1.15 to 1.45 percent concentration, which sets boundary ratios of about 1:20.9 at the weak end. The 1:15 baseline sits outside that optimal band but gives stable flavor and body in practice. Colombian Rose Valley beans serve as the working example.

The coffee-to-water ratio in pour-over coffee directly determines the flavor direction, and Front Street Coffee baristas are often asked about this in daily store conversations. Regardless of which dripper is used, Front Street recommends 1:15 as the brewing baseline. Although this ratio is not within the optimal range of the SCA Golden Cup theory, it delivers stable flavor and body in actual production. This article will explain the meaning of the coffee-to-water ratio, the Golden Cup extraction range, why 1:15 is chosen, and the specific operation of staged pouring, using Colombian Rose Valley coffee beans as an example to provide complete brewing parameters and flavor description, helping coffee lovers find a brewing plan that suits them.

Introduction

In the practice of pour-over coffee, the coffee-to-water ratio and pouring method are among the most frequently asked topics in stores. Front Street Coffee baristas are always generous in sharing their experience face-to-face with guests. No matter what shape of dripper is chosen, Front Street's advice is a coffee-to-water ratio of 1:15. Why is this ratio repeatedly recommended? Let's discuss it below from principle to practice.

What exactly does the coffee-to-water ratio refer to?

When making pour-over coffee, the amount of water poured in significantly changes the final flavor. Different coffee-to-water ratios make the coffee present completely different aromas and tastes. With too little water, the flavor is too concentrated and the layers cannot open up; with too much water, it tastes weak, even like a cup of water with coffee flavor. The so-called coffee-to-water ratio is the proportional relationship between coffee grounds and water, expressed in numbers as the amount of water needed to brew one portion of coffee grounds. For example, 1:15 means 1 gram of coffee grounds corresponds to 15 grams of water.

What does the SCA Golden Cup theory say?

The ideal range for SCA Golden Cup extraction is: extraction yield 18%–22%, concentration 1.15%–1.45%. Coffee falling within this range is recognized as "good-tasting" by the Golden Cup system, though of course this is not the same as everyone's sensory experience. From the Golden Cup extraction chart, the boundary values of the coffee-to-water ratio can be read: the maximum ratio is 1:20.9 (concentration 1.15%, extraction yield 22%), and the minimum ratio is 1:14.3 (concentration 1.45%, extraction yield 18%). Further observation shows that the 1:17 line passes through the widest range of the Golden Cup area and is most likely to fall into the ideal range, followed by 1:16 and 1:18. In comparison, 1:15 is instead very difficult to hit the Golden Cup range.

So why still choose 1:15?

According to the logic of the Golden Cup extraction chart, the ideal coffee-to-water ratio should be between 1:16 and 1:18, and 1:15 is not among the recommendations. But in actual brewing, it can be found that when the ratio is widened to 1:18, although the extraction yield and concentration may fall within the Golden Cup range, it easily brings out unpleasant flavors—concentration can still be controlled, but the extraction yield is difficult to stabilize. Therefore, in actual production the ratio is appropriately tightened, and Front Street ultimately adopted 1:15.

Through multiple brewing experiments with light-roasted coffee, Front Street found that 1:15 corresponds to a concentration of about 1.35%–1.42%, with an extraction yield of 17.79%–18.73%. Although from the Golden Cup standard it only barely qualifies, sensory tests show that the flavor performance is very suitable, with no sharp acidity or astringency caused by under-extraction, and it can adapt to the production needs of the vast majority of coffee beans. Compared with larger coffee-to-water ratios that easily over-extract or produce bitterness, 1:15 is a safe and conservative choice. Although 1.35%–1.42% is a relatively high concentration in the Golden Cup system, such coffee is rich in layers and has a satisfying body.

Of course, 1:15 is only a reference value given by Front Street based on years of experience. When you are just starting out and unsure what ratio to use, you can treat it as a starting point and then adjust according to the actual taste. If it feels weak, you can try 1:14; if it feels strong, you can try 1:13, and so on.

So how much water should be added to 15 grams of coffee grounds?

Calculated at 1:15, 15×15=225 grams of water should be poured.

How do you brew a delicious cup of pour-over?

Front Street recommends using staged pouring for extraction. The advantage of staged pouring is that the coffee wall at the edge of the filter paper is not easily washed down, and at the same time each pouring stage increases the agitation of the coffee grounds; the water flow penetrating the coffee bed helps improve the extraction yield. The role of the first stage, the bloom, is not only to let the coffee grounds evenly absorb hot water and lay the foundation for subsequent even extraction, but it is also a key stage for extracting acidity—because the amount of water poured is small, the resulting coffee liquid is high in concentration and the flavor is more complex and changeable.

Front Street chose Colombian Rose Valley coffee beans for brewing, with the following parameters: V60#01 dripper, 15 grams of coffee grounds, coffee-to-water ratio 1:15, grind size based on 80% passing through a 0.85 mm sieve (about the coarseness of fine granulated sugar), water temperature 90°C.

The specific method of staged extraction: first use 30 grams of water to bloom for 30 seconds, then pour in a small stream in circles until 125 grams, pause, and when the water level drops and is about to expose the coffee bed, continue pouring to 225 grams and stop, then once again wait until the water level drops to just about to expose the coffee bed and remove the dripper. Timing starts from the bloom, and the total extraction time is 2 minutes 00 seconds.

Brewing Rose Valley coffee with a 1:15 coffee-to-water ratio gives the following flavor performance: rose floral aroma, sugarcane-like sweetness, obvious fruit notes, and both acidity and sweetness are prominent.

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The above content is compiled by CoffeeHunters, a coffee news website.