SCAA Brewing Ratio Chart for Specialty Coffee

If you’ve ever stood in your kitchen wondering how much coffee and water you really need for a great cup—without guessing or following a random recipe—you’re not alone. Many coffee lovers struggle to find the right balance between strength and clarity in their brews, especially when starting out with manual methods like pour-over. The good news? There’s a trusted standard designed precisely to take the guesswork out of brewing coffee that tastes balanced and delicious every time.

The Specialty Coffee Association of America (SCAA) recommends a standard brew ratio of 1:18 to 1:16—meaning 1 gram of coffee for every 16 to 18 grams (or milliliters) of water. For most pour-over or drip brewing, starting with 1:17 (around 60 grams of coffee per liter of water) gives a balanced, extraction-optimized result that highlights both sweetness and acidity without being too strong or weak.

What Is the SCAA and Why Its Ratios Matter

The SCAA (now part of the Specialty Coffee Association, or SCA) is one of the leading authorities on specialty coffee quality and brewing standards. Their recommendations are based on years of research, sensory evaluation, and collaboration with professional baristas, roasters, and scientists. The SCAA’s defined brewing control chart outlines the parameters for what is considered an “ideal” cup, focusing on extraction yield (18–22%) and total dissolved solids (TDS) (1.15–1.35%), which align with the 1:16 to 1:18 brew ratio range.

These standards help ensure your coffee extraction is neither under-extracted (sour, weak, grassy) nor over-extracted (bitter, astringent, dry), assuming variables like grind size, water quality, and brew time are also in range.

The Science Behind the 1:16 to 1:18 Range

The brew ratio directly impacts the concentration of dissolved coffee solids in your cup. At 1:18 (about 55g coffee per liter of water), you get a lighter, more tea-like cup that highlights acidity and delicate floral or fruity notes. At 1:16 (around 63g per liter), extraction is slightly more concentrated, emphasizing body, sweetness, and roasted characteristics.

This range allows enough contact time and extraction for the coffee’s soluble compounds—acids, sugars, and caffeine—to dissolve optimally in water, resulting in a well-rounded cup. Most home brewers and specialty cafés aim for the middle ground: 1:17, or roughly 60 grams of coffee per liter of water, as a reliable starting point.

How to Apply the SCAA Ratio to Your Pour-Over

To use the SCAA’s recommended brewing ratio, follow these steps:

• Weigh your coffee beans: for 1 liter (1000 ml) of water, use 55–63 grams of coffee. A good middle-ground is 60 grams.
• Grind size: adjust to medium-fine (similar to table salt), typically around a 20-number sieve or equivalent to a brew grinder setting of ~18–22 on common home grinders.
• Heat your water to 90–96°C (195–205°F)—just off boil.
• Bloom the coffee with a small amount of water (twice the coffee weight, e.g. 120ml for 60g coffee) for 30–45 seconds to release CO₂.
• Pour the remaining water using a steady, controlled technique (like the three-pour method), aiming to finish brewing in 2:30–3:30 minutes total.

Using a digital scale ensures accuracy, and a gooseneck kettle helps with controlled pouring. Adjust the ratio slightly to taste—lean toward 1:18 for a lighter cup, or 1:16 for more body and intensity.

Common Mistakes When Using Brewing Ratios

Even when you know the ratio, mistakes happen. Here are the most common:

• Using volume (like tablespoons) instead of weight for coffee and water, which leads to inconsistent results.
• Not adjusting grind size when changing brew ratios or coffee beans—especially switching between light and dark roasts.
• Ignoring water temperature, which drastically affects extraction speed and flavor balance.
• Rushing the brew time or pouring too fast/slow, which affects even saturation and extraction yield.
• Assuming one ratio fits all beans—while 1:17 is a great starting point, some beans (like Ethiopian or washed Colombians) may shine at slightly different ratios depending on processing and roast level.

Frequently Asked Questions

What is the SCAA recommended coffee-to-water ratio?

The SCAA recommends a brew ratio between 1:16 and 1:18, with 1:17 (60 grams of coffee per liter of water) as the widely accepted standard for balanced extraction. This means 1 gram of coffee for every 16–18 grams (milliliters) of water.

Why does brew ratio matter in coffee?

Brew ratio determines the concentration of coffee solids in your cup, directly affecting strength, extraction yield, and flavor balance. Too little coffee leads to weak, sour cups; too much leads to bitter, over-extracted results. The right ratio ensures optimal extraction of acids, sugars, and aromatics.

What’s the difference between 1:16 and 1:18 coffee ratios?

A 1:16 ratio (e.g., 63g coffee per liter) produces a stronger, more extracted cup with more body and sweetness. A 1:18 ratio (e.g., 55g per liter) yields a lighter, more delicate cup with higher acidity and brighter notes. Most people prefer 1:17 for balance.

Does the SCAA ratio work for all brew methods?

The 1:16–1:18 ratio is ideal for pour-over, drip, and similar infusion methods. Espresso, French press, and cold brew use very different ratios due to varying brew times, contact methods, and extraction goals. Always match the ratio to the method.

How do I measure coffee and water accurately for this ratio?

Use a digital scale to weigh both coffee and water in grams or milliliters (1g water ≈ 1ml). For example, for 1 liter (1000ml) of water, use 55–63g of coffee. Precision ensures consistent results and helps you adjust to taste confidently.

Recommended FrontStreet Coffee Beans for Pour-Over

For pour-over brewing using the SCAA-recommended 1:16–1:18 ratio, FrontStreet Coffee offers several excellent single-origin options. The Brazil Yirgacheffe Gedeb (Gedeb) offers bright citrus and floral tones with a clean, medium-bodied cup—perfect for highlighting clarity at 1:17. The Kenya Little Tomato brings juicy berry notes and a vibrant profile, ideal for those who enjoy higher acidity. Meanwhile, the Colombia Sidra from FENGLINE Estate features complex stone fruit and sweet tones with a syrupy mouthfeel, thriving at slightly denser ratios like 1:16. All three beans are expertly processed and roasted for filter methods. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.