The coarseness of coffee grounds directly determines the resistance and contact area when hot water passes through the coffee bed, which in turn affects the flavor direction of the final cup. A short extraction time requires finer particles to increase surface area; a longer time requires larger particles to avoid over-extraction. Grind size and extraction time need to form a proportional relationship to balance acidity, sweetness, and bitterness. Light and dark roasts also have different requirements for grind size: light roasts favor slightly finer grinds, while dark roasts favor slightly coarser ones. In addition, coarseness is also a key lever for controlling bitterness: too fine and all the astringent, bitter compounds are released; too coarse and the sweet aromatics remain trapped in the grounds. This article will systematically review how grind size affects extraction yield, flavor, and equipment compatibility, and offer practical directions for adjustment. [more…]

When brewing coffee, the grind size directly determines the surface area where water meets the coffee and the speed at which hot water passes through, and even a slight deviation can ruin the entire cup's flavor. If a moment of carelessness leaves the beans ground too coarse, how can you salvage the situation? This article compiles several practical remedies—from re-grinding to flexible adjustments of water temperature and time—and, using Guji Huakui 8.0 as an example, provides complete parameters and steps to still brew a clean, full-bodied cup even after the grind has come out coarse. Whether you use a hand grinder or rely on pre-ground coffee from a vendor, you can find a corresponding adjustment plan to bring each cup as close to ideal as possible. [more…]

Grinding is crucial to coffee extraction—one could say that the coarseness of the coffee grind directly affects the flavor of a cup of coffee. And for different extraction methods, the coffee grind size also needs to be adjusted. The coarseness of the coffee grind directly affects the length of extraction time and the level of extraction yield. Coffee grind [more…]

For more specialty coffee knowledge, please follow: Front Street Coffee (Frontsteet Coffee). In coffee, the coarseness of the grind directly affects the contact area between coffee and water as well as the extraction time, and it will directly affect the taste of the coffee. But at the same time, the coffee grind size is also what gives many people the biggest headache. [more…]

Grind particle size is one of the key variables that determines the direction of coffee flavor. Starting from the practices of Front Street Coffee, this article systematically reviews the influence of grind size on extraction efficiency in pour-over coffee, the grind standards suited to medium-light and medium-dark roasts respectively, and how to use a 0.85mm No. 20 sieve to test the pass-through rate. It also extends to the extremely fine grind requirements of espresso, explains the effect of the grinder burr spacing on extraction time, and provides the specific extraction parameters and flavor description of Front Street espresso. In addition, the article also explains the relationship between the choice of Moka pot coffee grounds coarseness and the oils it produces, helping coffee enthusiasts find a grind plan suitable for their own equipment at home. [more…]

The coarseness of coffee grounds directly determines the contact area between water and coffee and the extraction time, which in turn affects the final taste. But grind size is also the most headache-inducing step for many enthusiasts. Starting from Front Street's practical experience, this article systematically explains how to determine the resting time based on the roast date, the actual impact of grind coarseness on flavor, and how to calibrate the grind size for different brewing methods using a No. 20 sieve. The article also compiles the suitable equipment for five particle sizes, from extra-fine to coarse, helping you roughly judge the grinding direction even without a professional sieve and find the grinding parameters that suit your own taste. [more…]

Grind size has a decisive influence on the final flavor of a cup of coffee: if the grounds are too fine, over-extraction is likely; if too coarse, under-extraction may occur. Faced with the 1-to-10 settings on a grinder, many coffee enthusiasts don't know how the numbers correspond to coarseness, nor are they clear about what grind level to choose for different brewing methods. Drawing on the practical experience of Front Street Coffee, this article systematically sorts out the standards for coffee grind size, the appropriate grind levels for common brewing methods, and the reference values for the EK43 grinder. It also explains in detail how to use a 0.85mm No. 20 sieve for sieve verification, helping you accurately judge and adjust grind size at home, so that every cup of coffee can consistently present its ideal flavor. [more…]

The choice of coffee grind size directly determines the success or failure of a cup of coffee. From the ultra-fine powder for Turkish coffee to the coarse particles needed for a French press, every brewing device has its corresponding grind standard. The finer the grind, the higher the extraction rate and the slower the water flow; the coarser the grind, the opposite. There are assembly tolerances between different grinders, so even the same setting may not produce coffee grounds of the same coarseness. This article systematically sorts out eight grind levels from finest to coarsest, matching them one by one with devices such as espresso machines, AeroPress, siphon brewers, pour-over, moka pots, cold brew, and French presses, and combines Front Street Coffee's brewing examples to help coffee lovers find a grind plan that suits them. [more…]

How coarse or fine you grind your coffee directly affects the contact area between water and coffee particles and the extraction time, and it is also a key variable that determines whether a cup of coffee tastes good or not. But grind size is precisely the part that many enthusiasts are least sure about. Starting from Front Street Coffee's practical experience, this article first explains the prerequisite effects of fresh roasting and bean resting on grinding results, then analyzes the different flavor directions of fine and coarse grounds, and afterward gives a specific method for calibrating the pass rate with a 0.85mm cupping sieve. It also lists reference ranges for light, medium, and dark roast beans, and finally includes a practical summary for judging coarseness by brewing device when you do not buy a sieve. [more…]

Which grind size from 1 to 10 is the finest for coffee beans? In most cases, the smaller the number, the finer the grounds. The grind size of coffee beans plays an important role in extracting a cup of coffee. For example, if the coffee grounds are too fine and used for pour-over coffee, it will result in over-extraction, while if they are too coarse, it will result in under-extraction. Secondly, factors such as the beans from each producing region [more…]

In the world of pour-over coffee, grind size is one of the key variables that determines the success or failure of a cup. If the coffee grounds are ground too fine, it easily leads to over-extraction and a bitter taste; if ground too coarse, it leads to under-extraction and a weak, watery flavor. So is there a reference standard for pour-over coffee grind size? Through extensive practice, Front Street Coffee uses a 0.85mm sieve as the benchmark, taking a grinding degree with a sieving pass rate of about 80% as the pour-over reference, and for medium-light roast and medium-dark roast coffee beans gives specific recommendations of a 75-80% and 70-75% pass rate through a No. 20 sieve. This article will systematically explain the mechanism by which grind coarseness affects flavor, sieve testing methods, tool choices for beginners, and Front Street's approach to grind size settings when brewing single origins such as Ethiopian washed Yirgacheffe, while also sharing practical points such as the three-pour method, coffee-to-water ratio control, and coffee bean freshness, to help coffee enthusiasts build a stable and reproducible pour-over system. [more…]

Grind size is one of the core variables that determines the direction of coffee flavor. If the grounds are too coarse, flavor compounds are under-extracted and the coffee tastes thin as water; if the grounds are too fine, bitterness and off-flavors are over-released, throwing the cup out of balance. It is often said in coffee circles that "the grinder is more worth investing in than the coffee machine," which shows just how critical grinding is. This article systematically covers the medium-fine and medium-coarse grind standards for pour-over coffee, the practical method of sifting grounds with a 0.85mm sieve, the ultra-fine grind required for espresso under 9 bar of pressure, and the grind range for the moka pot that falls between the two. It also draws on Front Street Coffee's brewing experience to offer water temperature recommendations for different roast levels and espresso blend bean recommendations. [more…]

A delicious cup of coffee is hard-won, because from seed to cup is a very long wait. Even at the final step of extraction, you must ensure that the coffee you use meets brewing standards, because extraction is easy—but have you ever thought about it? Coffee grounds are what extract the flavor compounds, [more…]

Grind size is one of the most critical variables in pour-over coffee—it determines the contact area between water and coffee grounds, and also influences extraction time and the final flavor. This article will systematically sort out the logical relationship between grind size and extraction yield, tell you what kind of taste will appear in the cup when the grind is too fine or too coarse, and also introduce how to use a 0.85mm sieve to calibrate the passing rate, and give specific grinding recommendations for beans with different roast levels. If you do not want to buy an extra sieve, the article also categorizes five levels—extra fine, fine, medium-fine, medium, and coarse—so you can quickly find the right setting by comparing it with your own brewing device. [more…]

In the world of pour-over coffee, beyond the common brewing schools, two opposing approaches have emerged, divided by grind size and brew time: fine grind fast brew and coarse grind slow brew. Both are based on the same extraction principles, yet they deliver entirely different drinking experiences. This article will analyze the theory behind these two approaches from the perspectives of surface area, water flow rate, and dripper pairing, and conduct a practical comparison using the same medium-roast Papua New Guinea · Bird of Paradise beans, using a V60 and a Kono dripper, the same coffee-to-water ratio and water temperature, to observe the specific flavor differences between fine grind fast brew and coarse grind slow brew, helping coffee enthusiasts understand how to choose the right brewing strategy based on grind size. [more…]

Grind size directly determines the extraction direction of a cup of coffee: too fine a grind easily leads to over-extraction and bitterness, while too coarse a grind may result in under-extraction and a weak, bland flavor. Many grinders on the market mark their settings from 1 to 10, but the corresponding coarseness varies across different models. A smaller number usually means a finer grind, but in practice, you need to judge based on your brewing method. Drawing on the hands-on experience of Front Street Coffee, this article sorts out the grinding ranges for common brewing methods such as espresso, pour-over, siphon, and French press, explains whether medium-light roast and medium-dark roast coffee beans are better suited to a medium-fine or medium-coarse grind for pour-over, and provides specific steps for using a 0.85mm No. 20 sieve to check the passing rate, helping coffee enthusiasts find the right grinding parameters. [more…]

Brewing a good cup of coffee makes grind size an unavoidable key variable. If the particles are too coarse, flavor extraction is insufficient; if ground too fine, it easily brings out bitter and off-flavors. But just how coarse counts as coarse, and how fine counts as fine? And how should you convert between different brewing devices? This article uses the industry-recognized cupping standard as its baseline and the No. 20 sieve pass-through rate as a unified ruler, providing reference grind ranges one by one for French press, pour-over, cold brew drip, and espresso machines, explaining how roast level and bean density affect grinding results, and finally including Front Street Coffee's approach to dialing in espresso extraction, helping you turn grind size from "guesswork" into "data." [more…]

Many coffee enthusiasts, after buying Starbucks coffee beans, often find themselves at a loss when faced with the grinder settings, worrying that grinding too coarse or too fine will ruin the coffee's flavor. In fact, grind size directly affects the speed at which water passes through the coffee bed and the extraction efficiency, making it a key variable that determines the success of a pour-over. Starting from Front Street's brewing practices, this article first explains the underlying logic of how grind size affects extraction, then separately describes the appearance of the coffee bed and the drip performance when the grind is too fine versus too coarse, and finally provides specific steps for measuring the passing rate with a 0.85mm test sieve and precisely calibrating the grind setting, helping you find the right grind parameters for Starbucks beans of different roast levels. [more…]

In the process of making American coffee, the grinding step is often overlooked by most people, yet its impact on the final flavor is extremely critical. Many coffee enthusiasts focus on water temperature, coffee dose, or equipment type, but rarely delve into the coarseness of the coffee grounds. Starting from the difference between freshly ground and pre-ground coffee, this article will systematically explain the suitable grind size for American coffee machines, the grinding requirements of different extraction methods, as well as the origins and flavor differences between espresso and American coffee. It will also combine Front Street Coffee's recommended beans to help you master the essentials of making American coffee more comprehensively. [more…]

If you are a passionate lover of pour-over coffee, then you must know that the following factors are among the reasons that affect your coffee's extraction and flavor! So let's count them with Front Street: water temperature, grind size, coffee-to-water ratio, extraction time... Front Street Coffee (FrontStreet [more…]