Should Pour-Over Coffee Grind Be Coarse or Fine? What's the Difference Between Type 01 and 02 Drippers? What Should You Note When Brewing for Single vs. Multiple Servings?

When More Coffee Isn't Better: Understanding Filter Capacity

Ever had one of those moments where you wanted to show off your coffee skills in front of guests, only to have everything fall apart? Say friends come over and you want to brew a pot to share. Because there are so many people, you add extra grounds hoping to produce more coffee in one go—only to find the result tastes far worse than expected.

Once the flavor goes sideways like that, many people wonder: why does simply adding a bit more coffee produce such an unpleasant cup?

The answer is simple: when the amount of grounds exceeds your dripper's optimal capacity and you haven't adjusted your brewing to match, the coffee simply can't reach its ideal flavor.

Understanding Filter Capacity Differences

01 and 02 are the size designations for dripper volumes. The 01 is the small dripper, designed for 1–2 servings; the 02 is the large one, meant for 3–4. Most home brewers own the 01, since they usually brew a single cup. Each dripper size has its own ideal dose—for the 01, the recommended range is 13g–20g of grounds, with 15–17g as the sweet spot.

During pouring, most of the grounds on the surface rise with the water level, then settle outward as the hot water drains, forming what we call a "grounds wall" along the dripper walls. This relocation thins the coffee bed at the center, which helps extraction stay even.

But if your dose is too small, there aren't enough grounds to build a proper wall, and some hot water slips straight down into the server without ever touching the coffee—bypass water that drags down the whole cup. Use too much, on the other hand, and even though most grounds distribute along the walls, the central bed stays thick! A thick bed forces the water through more coffee, so drainage takes longer. Stick with your original recipe and the coffee will likely over-extract—partly because drainage is slower, and partly because the dripper's limited capacity forces you to pour in more segments, stretching total extraction time and pushing the cup toward over-extraction.

"So does that mean I need a bigger dripper to brew a larger dose well?" some might ask.

Solutions for Different Scenarios

If you keep the dose around 20g, the 01 is perfectly fine—20g sits right at the top of its optimal range. Above 20g, it's best to move to a larger dripper if you have one. But if you don't, no need to force it: just adjust your brewing method and extraction parameters!

How to Brew a Large Dose in a Small Dripper

The fix is simple: grind coarser and brew faster. Since extra grounds slow down the flow, we go coarser to widen the gaps between particles and bring drainage back to normal. The adjustment doesn't need to be dramatic—just 0.5 settings coarser than usual! Take medium-light roasted beans as an example: FrontStreet Coffee normally grinds at EK43 setting 10, with an 80% pass rate on a #20 sieve—fine-sugar sized particles. For a 25g dose, we shift to EK43 setting 10.5, with a 75% pass rate on the China #20 standard sieve (somewhere between fine and coarse sugar).

One caveat! Bigger particles extract less efficiently. Watch the flow rate and taste the cup. If the flow normalizes and the flavor holds up, keep the recipe! If the brew runs much faster, compensate by raising the water temperature to make up for the lost extraction efficiency and avoid a weak, under-extracted cup.

Raise the water temperature by 1–2°C above your usual setting, depending on how coarse you ground and how long the extraction ran. Then use a larger water flow to evenly push the bigger dose of grounds toward the dripper walls, keeping extraction uniform. With these adjustments in place, you can brew a delicious pot even with lots of grounds in a small dripper!

- END -

FrontStreet Coffee Recommendation

Which beans suit a V60 dripper best? The cone shape and 60° angle funnel water to the center, extending contact between water and grounds for full extraction, while the single large hole lets flow speed depend entirely on your pour control—perfect for highlighting florals, fruit acidity, and clarity. FrontStreet Coffee's Ethiopia Yirgacheffe Guodingding is a classic match: jasmine florals and bright citrus acidity with green tea and honey tones after a medium-light roast. For louder fruit, the Huakui offers strawberry, passion fruit, and jackfruit in a juice-like cup, while the Kenya Cherry Tomato—SL28 and SL34 grown at 1,550–1,750m in Thika and double-washed over 72 hours—bursts with cherry tomato, dark plum, and muscovado sweetness.

If you prefer a rounder, low-acid cup even from a cone dripper, FrontStreet Coffee's PWN Golden Mandheling (herbal, dark chocolate, low acid) and Jamaica Blue Mountain No.1 (cream, caramel, chocolate, and nuts in flawless balance) will happily fill your 01 dripper—just dose 15–17g, grind for a 78–80% pass on the #20 sieve, and pour in segments.