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Home / Brewing Guides/ Espresso | What is the golden extraction ratio for espresso? Does the ratio of coffee powder to liquid when making espresso have to be 1:2?

Espresso | What is the golden extraction ratio for espresso? Does the ratio of coffee powder to liquid when making espresso have to be 1:2?

2026.10.20 FrontStreet Coffee 527
Front Street believes that when everyoneAfter being exposed to Italian coffee for a while,You will definitely not be unfamiliar with the powder-to-liquid ratio of "1:2", because it is often hailed as the "golden ratio" of Italian espresso. It is the most commonly used ratio when extracting espresso.

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The powder-liquid ratio refers to the ratio between the amount of coffee powder used and the resulting coffee liquid. For example, a powder-liquid ratio of 1:2 means that for every 1 gram of coffee powder used, 2 ml more coffee liquid needs to be extracted. For example, assuming that the amount of powder we use is 18g, if we extract coffee liquid according to the powder-to-liquid ratio of 1:2, we need to extract 36ml of coffee liquid.
Because major bloggers often call it the "golden ratio" of espresso when sharing this ratio.(We can understand it as a good meaning), so many friends are curious: Why must 1:2 be used for concentration? Isn’t it okay to use ratios such as 1:4, 1:5, and 1:6?
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Does espresso have to use 18g of powder to extract 36ml of coffee liquid?
when! Yes! Can! by! No matter which ratio you use, or you can use 18g of powder to extract 50, 60, 70ml of coffee liquid or even more, it’s all possible! This does not mean that 1:2 espresso is necessarily the best tasting. As long as the parameters are appropriate, no matter which ratio is used and how much liquid weight is extracted, you can get a cup of delicious espresso.
However, there is no reason why the ratio of 1:2 is known as the "golden ratio" because this ratio can extract espresso that better meets our needs. You can think about it, what does the ratio of powder to liquid determine?

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That's right! It's the strength of the coffee. Front Street often shares that the concentration of coffee is mainly affected by the amount of water. When other parameters remain unchanged, the more water you use when extracting coffee, the more coffee liquid you get, but the lower the concentration, and vice versa.
Below are two cups of coffee extracted by Front Street using the same amount of powder. The coffee beans used are the Front Street Premium Blend 100% Arabica from the Front Street Italian Bean List. The extraction time is both 30 seconds. The difference between the two is the ratio used. The ratio of one cup of coffee is 1:2, that is, 18g of powder extracts 36ml of coffee liquid; while the ratio used in another cup is 1:4, that is, 18g of powder extracts 72ml of coffee liquid.

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Through the measurement of the concentration meter, we can get that their concentrations are 10.83% and 5.36% respectively, which is about twice the difference. The flavors are all fragrant nuts and chocolate. The only difference is that one cup has a higher concentration, so the taste will be richer and more concentrated. The other cup has a lower concentration, so the layers are more distinct and the flavor is more discernible. It can be said that each has its own characteristics.

Why 1:2Will it be known as the golden ratio?
It's simple, because the coffee extracted with it will have a high enough concentration.In daily life, not many people taste espresso directly. Most people prefer to use espresso as a base for making other fancy coffees. For example, add milk to make latte or kabob, or pour concentrate on milk to make dirty, etc.

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The demand for espresso in most fancy coffees is to have a certain concentration, especially those with milk added. Only when the concentration of the concentrate is high enough can the latte, cappuccino, Australian white and other coffee we make taste high enough. But if the concentration of the concentrate is too low, the coffee will have a more obvious "watery" feel. Although the taste is passable, the taste will not be that outstanding.(For American style, any ratio is acceptable)
Therefore, "1:2" has become the most commonly used powder-to-liquid ratio when extracting and concentrating. The coffee extracted with this ratio not only has a complete flavor expression, but also has a high enough concentration that it can have an excellent performance even if a large amount of milk is added.

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But what everyone needs to know is that we do not need to fix the ratio at 1:2 during actual extraction.Any range above and below 1:2 is acceptable, such as 1:1.5 or 1:2.5, there is no problem.The ratio of 1:2 is just an indicator. What it tells us is that within this range, we can extract a cup of espresso that is high enough to make delicious fancy coffee.

You can now buy the above coffee beans online at the Taobao store “FrontStreet Coffee” (前街咖啡). FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou, China, and its Guangzhou retail shop sells coffee beans only. The shop carries dozens of coffee beans from different origins around the world, including carefully selected single-origin beans for V60 pour-over and espresso. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers.

The FrontStreet 2013 Yunnan coffee beans sold in the store come from the Typica variety grown at FrontStreet Coffee’s own plantation in Yunnan. The name comes from the year the brand and the plantation were founded. You can buy these beans from China’s Yunnan origin at the Guangzhou shop and at FrontStreet’s Taobao store.

FrontStreet coffee beans are freshly roasted within 5 days and deliver consistently excellent quality and great value. Orders placed before 17:00 are shipped the same day, and most areas within Guangdong Province receive them the next day.

FrontStreet Coffee Taobao store: https://qianjiecoffee.taobao.com
Or search for “前街咖啡” (FrontStreet Coffee) on Taobao
Important Notice: FrontStreet Coffee has moved to a new address: 315, Donghua East Road, Guangzhou (coffee beans only)
Tel: 020 38364473

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