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Four knowledge points about coffee brewing: water injection, powder-to-water ratio, quantity and water quality

Published: 2026-04-24 Author: World Gafei

Last Updated: 2026/04/24, Communication of professional baristas Please pay attention to the speed and way of injecting hot water into the coffee workshop (Wechat official account cafe_style) when injecting hot water will also affect the extraction time in the brewing process, the amount of water injected and the mode of injection will also affect the degree of extraction of coffee, so we must try to control some uncertain factors such as water quantity and water temperature in order to reduce the change of coffee taste. Make the pot by hand.

For professional baristas, please follow the coffee workshop (Wechat official account cafe_style)

The speed and mode of hot water injection will also affect the extraction time.

In the brewing process, the amount of water injected and the mode of injection will also affect the degree of extraction of coffee, so it is necessary to control some uncertain factors such as water quantity and water temperature as far as possible in order to reduce the change of coffee taste.

Take the brewing method of the hand pot as an example, the amount of water should be kept at a certain amount each time, and the water injection position should be as consistent as possible, and the water injection position should not be too high, it is easy to mix with the air, and the distance from the surface of the coffee pot is about 3 to 4 centimeters. When the water comes into contact with the coffee table, try to keep it round, from the outside to the inside, and repeat the brewing action from the inside to the outside, and then fully steaming, you can brew mellow and high-quality coffee.

The ratio of coffee beans to water

Each cup is boiled with 15 grams of grinding powder, about one cup can be boiled about 150c.c. It's coffee. In other words, a 150c.c. Coffee needs to be brewed with 15 grams of coffee powder. Espresso machine, 7-9 grams of finely ground coffee powder and 30~40c.c per cup. The amount of water.

Quantitative concept

Use standard coffee gauges. 2 tablespoons ground coffee with 160 grams of water; the dosage can be adjusted according to personal taste and experience.

Water quality is also important.

Use fresh water. Filtered or bottled water may be used in some areas and unfiltered water may be avoided. If you use a water purifier and a filter equipped with activated carbon, you can also avoid impurities and odors in the water. Therefore, as long as the use of good quality and fresh coffee, the tap water available at home can also make mellow and delicious coffee.

FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。