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

Pour-over water volume follows the dose of grounds and the chosen ratio. A common starting point is 15g of coffee at a 1:15 ratio, which means pouring 225ml of water. The ratio is a preference, not a rule: a richer cup sits between 1:10 and 1:13, while a lighter cup is usually 1:16 to 1:17.

Water volume controls both extraction and concentration. Hot water extracts more from the grounds early in the pour and less later, which is why the first drips run darker. The coffee association notes that roughly 30% of coffee bean material dissolves in water, and an extraction yield of 18% to 22% is generally considered the target.

Pour-over coffee emphasizes precision and ritual; from the grams of coffee grounds and water temperature to the amount of water poured, every step affects the final flavor. The amount of water poured depends on the dose of grounds and the coffee-to-water ratio. Front Street typically uses 15g of grounds with a 1:15 ratio, meaning 225ml of water is poured. The coffee-to-water ratio is not absolute—those who prefer a rich cup favor 1:10 to 1:13, while those who prefer a lighter cup commonly use 1:16 to 1:17. This article also uses Front Street Mandheling as an example, demonstrating in detail from parameters to technique how to brew a rich, full-bodied cup at home, so you can understand the balance between water volume, extraction yield, and concentration.

For more specialty coffee knowledge, please follow our WeChat official account: Front Street Coffee (FrontStreet Coffee)

Pour-over coffee carries a sense of ritual, and this is true during actual brewing as well. The coffee grounds must be weighed to the exact gram, the water temperature must be controlled precisely, and even how much water to pour over the grounds cannot be handled carelessly.

Why is the amount of water poured worth such precision?

Pour-over is a drip extraction method: hot water continuously passes through the bed of coffee grounds, carrying soluble substances into the carafe below. In other words, the more water poured, the more coffee substances are extracted.

But coffee is not like tea leaves that can be brewed repeatedly, nor is more dissolved material necessarily better-tasting. The SCA (Specialty Coffee Association) states that about 30% of the substances in coffee beans are soluble in water, and the general consensus is that an extraction yield of 18% to 22% produces the best flavor; beyond this range, it will most likely become undrinkable.

Besides the upper limit on extracted substances, the dissolution efficiency of pour-over must also be considered. If you observe carefully, you will notice that the first drips of coffee liquid are darker in color, and the color becomes lighter as it goes on. This shows that hot water has a stronger extraction capacity in the early stage, which gradually weakens afterward. So controlling the amount of water poured is essentially also adjusting the coffee concentration: less water means stronger, more water means weaker.

So exactly how much water should be poured?

To achieve a reasonable balance between concentration and flavor compounds, the amount of water poured becomes very critical. Taking pour-over as an example, the amount of water poured is determined jointly by the dose of coffee grounds and the coffee-to-water ratio. Front Street's standard practice is to use 15g of grounds at a 1:15 ratio, meaning 225ml of water is poured. After many brewing experiments with light-roast beans, Front Street found that at this ratio the concentration is about 1.35% to 1.42%, corresponding to an extraction yield of 17.79% to 18.73%, which is a very suitable range for drinking.

So how much water should be poured for 20g or 25g of grounds? Still converted at a fixed coffee-to-water ratio: 20g of grounds with 300ml of water, 25g of grounds with 375ml of water.

Does pouring more or less make a big difference?

The 1:15 ratio recommended by Front Street is not a hard standard, nor does it mean other ratios taste bad. For example, those who prefer a rich mouthfeel will choose 1:10 to 1:13, producing a more solid and full-bodied cup; some baristas are used to using 1:16 or 1:17 to let the flavors unfold more freely while catering to the generally lighter taste of the public.

Of course, the coffee-to-water ratio must work with other brewing variables to bring out good flavor. Based on Front Street's parameters, anything between 1:15 and 1:16 can deliver good flavor, and this range can be regarded as reasonable parameters. If less water is poured than 1:15, the coffee tends to be strong but unbalanced; if more than 1:16, it will be thin as water.

Below, taking Front Street Mandheling as an example, we will demonstrate the complete process from parameters to technique, teaching you how to extract the rich, full-bodied Mandheling flavor at home.

What is Mandheling flavor?

Even today, Indonesian coffee still holds an important place in the global market. What Indonesia grows is mostly hybrid varieties or medium-sized beans represented by Robusta, commonly called "Robo beans" domestically, mostly used for espresso blends or instant coffee. Mandheling, however, is one of the few local Arabica varieties, and with its uniquely distinctive flavor it has become a word-of-mouth specialty representative in the coffee world.

Front Street often mentions in articles that Mandheling, unlike many specialty coffees, is not named after a variety or a region; its name comes from a story during World War II. During the Japanese occupation of Indonesia, a Japanese soldier drank an exceptionally aromatic and full-bodied cup of coffee in a café and asked the owner what coffee it was. The owner mistakenly thought he was asking "Where are you from?" and answered, "Mandailing." After the war, the soldier recalled that the coffee he had drunk in Indonesia was called "Mandheling," and later people came to call the Arabica beans produced in Sumatra Mandheling coffee.

Before launching any bean, Front Street evaluates it through cupping. Cupping is a way to assess bean quality and flavor; unified standards allow a more objective identification of strengths, weaknesses, and characteristics. Through cupping, Front Street's Lindong Mandheling daily-drinker beans present intense nutty and dark chocolate notes, with a hint of caramel aroma in the finish; as the temperature drops, herbal plant flavors emerge, with a full-bodied mouthfeel and solid aroma.

To brew out the rich, full-bodied aroma of Front Street Mandheling, Front Street believes fresh roasting is the primary condition. Coffee aroma changes with the storage environment and time; once past the optimal flavor period, the aroma accelerates its loss. Front Street deeply understands the importance of freshness, so the beans shipped are all freshly roasted within 5 days, so that when you receive them they are just right to open and brew.

Since Mandheling presents nutty and chocolate notes, Front Street's roasters chose a medium-dark roast. The darker the roast, the more porous the bean structure and the easier it is to extract during brewing, so Front Street uses a lower water temperature to avoid over-extraction and the negative bitterness it brings.

Dripper: KONO dripper

Water temperature: 87℃

Dose: 15 grams

Coffee-to-water ratio: 1:15

Grind size: medium-coarse grind (70% passing through a Chinese standard No. 20 sieve)

First rinse the KONO dripper with hot water so the filter paper fits the dripper more closely, pour out the water in the sharing carafe, and add 15g of ground coffee. Bloom with 30g of water for 30 seconds, then start pouring in a small circular stream from the center; at 125g begin the staged pour. When the coffee bed drops to half the height of the dripper, pour the second stage in the same manner until 225g, then wait for all dripping to finish and remove the dripper.

The Front Street Golden Mandheling extracted this way smells of wood and caramel; drunk while hot, it is very full-bodied, with flavors of dark chocolate, spices, cream, pine, and caramel, with almost no perceptible acidity. As the temperature drops, the earlier bitterness becomes softer, accompanied by a distinct sweet aftertaste, like drinking a cup of aged Pu'er tea, with a long, lingering finish.

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