How to Brew Coffee with 15g, 20g, and 30g of Coffee Beans? How to Adjust Hand-Pour Brewing for 4 Servings

FrontStreet Coffee's standard for a single cup of coffee is 15 grams of grounds, so every brewing demonstration we share uses 15 grams as the baseline.

In practice, though, the amount of coffee people brew varies quite a bit. From what FrontStreet Coffee has observed, common doses come in multiples of 6—12 grams, 18 grams, 24 grams—derived from the standard single serving of 120ml of brewed coffee. Others come in multiples of 5—15 grams, 20 grams, 25 grams—striking a compromise with the recommended capacity of a given filter cup, so the dose suits the brewer's size while keeping the water ratio easy to calculate. There is also the 16-gram crowd, whose advantage is that segmented pours become trivial to calculate at a 1:15 brewing ratio.

How Different Doses Perform

Anyone accustomed to 15 grams develops a conditioned reflex (the same goes for any habitual dose). Pour 15 grams into a size 01 V60 dripper and the bed sits exactly at half the cone's height; with a familiar, steady pour, that bed state feels instantly recognizable. No exaggeration: even without a scale, you can hold a very consistent coffee-to-water ratio.

So the first real difference is the state of the coffee bed. When the dose difference is small (15 vs. 16 grams, say), the bed looks almost the same. But when the difference is substantial (15 grams vs. 20 grams), the change becomes obvious.

Brewing 15 grams and 20 grams in the same size 01 V60, the 20-gram bed will simply sit higher than the 15-gram one—and you need not touch your method or parameters at all, because you are still within the range of quantitative change. Try to push 25 grams through the same size 01 dripper, however, and you will likely run into trouble: the sensible capacity of that dripper is 10-20 grams, and beyond that it simply cannot hold enough water.

Some adjustments are therefore needed to keep the flavor consistent with your usual results. When using a small dripper for a large dose, multi-stage pouring becomes unavoidable. To prevent the longer contact time from pushing the cup into over-extraction, FrontStreet Coffee recommends setting the grind slightly coarser. On the EK43s, for example, FrontStreet Coffee goes 0.3 notches coarser when brewing large doses.

Next is the pour itself. A larger dose means a larger coffee bed surface area, so to keep the same rhythm, the water flow needs to scale up accordingly. In fact, large doses are considerably more forgiving than standard ones—flow rate, spiral movements, and the like have generous margins. The perceived difficulty comes mostly from unfamiliarity.

Switch to a properly sized dripper and most of these complications vanish. Manufacturers now offer size 02 drippers built for larger brews: a size 02 V60, for instance, suits 2-4 servings using 20-40 grams of grounds, removing the hardware ceiling entirely. One caveat: extraction time. When FrontStreet Coffee says a cup of coffee brews in roughly 2 minutes, that figure is based on a three-stage brew with 15 grams of grounds.

As the dose grows, so does the brew time. Following the three-stage method: 15 grams extracts in about 2 minutes, 20 grams in about 2 minutes 20 seconds, and 30 grams within 3 minutes.

Finally, dose changes call for matching adjustments to pour speed: larger doses want a stronger flow, smaller doses a gentler one. This is why those ultra-fine-spouted kettles are a poor match for big doses—where the advantages of the grenade-style kettle become obvious.

FrontStreet Coffee Recommendation

Whichever dose you settle on, the V60's fast, full extraction shines brightest with aromatic, fruit-forward beans. FrontStreet Coffee's Yirgacheffe Guodingding brings lively citrus, berry, and floral notes with a green-tea-like finish, while the Ethiopia Huakui piles on tropical fruit—strawberry, passion fruit, jackfruit, lychee—with obvious sweetness and barely any bitterness. For a smoother, more classic pour-over, the FrontStreet Jamaica Blue Mountain No.1 balances cream, caramel, chocolate, and nut flavors with a clean, long finish—an easy match whether you brew 15 grams for yourself or 30 grams for the table.