Pour-Over Coffee Basics: How to Get the Right Brew Ratio

Ever made a cup of pour-over coffee that turned out bitter or flat? Even when using quality beans, the wrong water amount, grind, or temperature can ruin your cup. Many assume coffee is supposed to taste bitter—but that’s usually a sign of over-extraction or poor technique. Here’s how to fix it.

The key to a balanced pour-over is a 1:15 brew ratio—1 gram of coffee to 15 grams (milliliters) of water. For 15g coffee, use 225ml water; for 30g, use 450ml. That’s your starting formula.

What Is Coffee Extraction?

Coffee extraction is the process of dissolving soluble compounds from ground coffee using water. Not all extracted material tastes good: too little extraction leaves coffee sour and underdeveloped, while too much pulls out bitter, astringent compounds. The goal is to dissolve the desirable aromatic and sweet compounds without overdoing the unpleasant ones.

Brew ratio, grind size, water temperature, and brew time all affect extraction yield. The “ideal” range is typically 18–22% extraction, yielding a cup that’s neither sour nor bitter. In pour-over, hitting that sweet spot depends on your control of these variables.

Why Use Pour-Over?

Pour-over coffee, also called filter coffee or drip coffee, was popularized in 1908 by German housewife Melitta Bentz, who invented the paper filter method and founded the Melitta company. Unlike espresso or French press, pour-over highlights clarity, cleanliness, and subtle flavors. It produces a clean cup that accentuates a coffee’s unique aromatics and sweetness, without the oils or heaviness of other methods.

The method involves pouring hot water through ground coffee held in a filter. Gravity pulls the brewed liquid down into your cup or server. The key advantages? Full flavor clarity and control over every variable in the brew.

How Fresh Should Your Coffee Beans Be?

Freshness matters—a lot. Coffee’s most volatile aromatic compounds start degrading almost immediately after roasting. FrontStreet Coffee recommends using beans within 4 to 35 days post-roast for peak flavor. While the beans are safe to drink beyond that, they gradually lose complexity, becoming dull or flat. For best results, always use freshly roasted beans—within 35 days—and store them sealed in a cool, dry place.

At FrontStreet Coffee, all beans are shipped within 5 days of roasting to ensure you get them at their most vibrant.

What You Need for Pour-Over Brewing

To brew a proper pour-over, you’ll need:

• Pour-over device (like V60 or Kono)
• Filter paper
• Gooseneck kettle
• Scale (grams & milliliters)
• Grinder (with consistent grind settings)
• Thermometer (or a kettle with temperature control)

Each piece affects the final cup. The filter and device influence flow rate and flavor clarity; the grinder dictates surface area and extraction speed. Even water temperature matters: too hot, and you risk bitterness; too cool, and you under-extract.

V60 vs Kono: Filter Choice by Roast Level

FrontStreet Coffee uses different pour-over devices depending on the roast:

• V60: Best for lighter to medium roasts. Its spiral ridges and single large hole promote a cleaner, brighter cup with higher clarity.
• Kono: Suited to medium-dark to dark roasts. Its design slows flow for fuller body and rounded mouthfeel.

These choices help tailor the brew to bring out the best in each bean’s roast profile.

The Ideal Grind Size for Pour-Over

Grind size dramatically affects extraction. For pour-over, FrontStreet recommends a grind size around 80% passing through a standard 0.85mm sieve—medium-fine, similar to granulated sugar. Too coarse, and extraction is uneven and weak; too fine, and you risk over-extraction and bitterness.

This medium-fine grind works well with the typical three-pour method and helps maintain an optimal brew time around 2 minutes.

How to Control Temperature

Water temperature is another critical variable. For lighter roasts, aim for 90–92°C. For medium to dark roasts, use slightly cooler water: 88–89°C. These ranges help extract the right balance of acids, sugars, and aromatics without pushing into bitter zones.

If you don’t have a precise kettle, boiling water (100°C) can be left to cool for about 30 seconds before pouring for medium roasts.

Step-by-Step: How to Brew Pour-Over Using the Three-Pour Method

Here’s a reliable beginner-friendly method using a 1:15 brew ratio:

• Coffee: 15g (adjustable)
• Water: 225g total (1:15 ratio)
• Grind: Medium-fine (80% through 0.85mm sieve)
• Water temp: 90–91°C for light-medium roast; 88–89°C for medium-dark

Step 1: Prep

Rinse your filter with hot water to remove any paper taste and preheat your server. Discard the rinse water.

Step 2: Bloom

Add 15g of coffee to the filter. Start your timer and pour 30g of water (just enough to saturate the grounds). Let it bloom for 30 seconds. This releases trapped CO₂ and prepares the coffee bed for even extraction.

Step 3: First Pour (30–125g)

From 0:30, pour up to 125g total water (so 95g more). Aim to wet all the grounds evenly. Let the coffee draw down until about half remains in the brewer.

Step 4: Second Pour (125–225g)

From around 1:00, slowly add the remaining 100g of water to reach 225g total. Pour gently, in small circles, avoiding the edges. Allow the coffee to fully drain. Total brew time should be about 2 minutes.

This three-pour method improves extraction consistency and avoids over-saturation or channeling.

Understanding the 1:15 Brew Ratio

The 1:15 ratio means 1 gram of coffee to 15 grams (milliliters) of water. So:

• 15g coffee → 225g water
• 30g coffee → 450g water

The breakdown for 15g coffee at 1:15 over three pours looks like this: 30g (bloom) → 125g → 100g, with a total weight (water) shown on a scale as: 30g → 125g → 225g.

This ratio balances strength and extraction efficiently, producing a clean, flavorful cup without excessive bitterness or weakness.

Frequently Asked Questions

What is the best brew ratio for pour-over coffee?

The recommended starting brew ratio is 1:15—that is, 1 gram of coffee to 15 grams (or milliliters) of water. For example, use 15g coffee and 225g water. This ratio provides a balanced strength and extraction suitable for most single-origin coffees.

What grind size should I use for pour-over?

Use a medium-fine grind, around 80% passing through a 0.85mm standard sieve. This is roughly equivalent to granulated or fine sugar. The grind affects extraction rate—too coarse leads to under-extraction, too fine to over-extraction and bitterness.

What water temperature is ideal for pour-over?

For light to medium roasts, aim for 90–92°C. For medium-dark to dark roasts, use 88–89°C. Proper temperature ensures you extract the right balance of flavors without extracting excessive bitterness.

How long should a pour-over take to brew?

A standard pour-over using the three-pour method should take about 2 minutes in total, including the bloom. This timing helps control extraction and avoid over- or under-brewing.

Does the type of pour-over dripper matter?

Yes. Drippers like the V60 are better for light to medium roasts due to their design, which highlights clarity and brightness. The Kono dripper is better suited for medium-dark to dark roasts, enhancing body and sweetness.

How do I avoid bitter pour-over coffee?

To avoid bitterness, don’t over-extract. Use a coarse-enough grind, don’t exceed 2:00 brew time, and keep water temperature below 93°C. Bitterness often comes from pulling out undesirable compounds during over-extraction.

Recommended FrontStreet Beans for Pour-Over

For pour-over, try FrontStreet’s Brazil Yirgacheffe HiBreed or Colombia Sidra. The Brazil Yirgacheffe offers a balanced cup with soft acidity, milk chocolate, and caramel—great for showcasing clarity. The Colombia Sidra, processed via double anaerobic fermentation, bursts with tropical fruit, jasmine, and apricot notes, ideal for light to medium roasts. Both beans highlight the clean, vibrant qualities of proper pour-over brewing. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.