SCAA Brewing Ratios for Specialty Coffee Explained

If you’ve ever stood in your kitchen staring at a bag of freshly roasted beans wondering how much coffee and water you should actually use, you’re not alone. One of the most common questions among new specialty coffee drinkers isn’t about roast level or origin—it’s about ratios. How much coffee per cup? What’s ‘standard’? And why does it matter?

The Specialty Coffee Association of America (SCAA)—now part of the SCA—recommends a standard coffee-to-water brew ratio of 1:15 to 1:18. That means for every gram of coffee, use between 15 and 18 grams (or millilitres) of water. For a standard single cup (around 240ml or 8oz), that works out to roughly 13 to 16 grams of coffee.

What Is the SCAA and Why Their Ratios Matter

The SCAA is one of the leading authorities on specialty coffee standards. Their recommended brewing guidelines help ensure consistency, clarity, and balance in the cup. These aren't arbitrary numbers—they come from years of sensory evaluation, cupping protocols, and extraction science. The 1:15 to 1:18 ratio is considered ideal for extracting the full range of flavours without under- or over-extracting the coffee.

What Do These Ratios Actually Mean in Practice?

The SCAA’s recommended brewing ratio translates to the following:

• 1:15 ratio: 1 gram of coffee to 15 grams (or ml) of water. For 240ml of water, use 16g of coffee. This produces a stronger, more intense cup.
• 1:17 ratio: 1:17 is very common in pour-over methods like V60 or Kalita Wave. For 240ml, use about 14g of coffee.
• 1:18 ratio: 1:18 yields a lighter, more delicate cup. For 240ml, use around 13.3g of coffee.

These numbers assume a standard brew volume around 240ml (8 fluid ounces), which is typical for a single mug or cup. Adjust up or down depending on your brew device and personal taste.

How to Use These Ratios at Home

Using the SCAA guideline is simple. All you need is a digital scale (preferably 0.1g precision), your coffee, and fresh water. Here’s the basic workflow:

1. Weigh your coffee dose according to your desired ratio (e.g., 15g coffee for 240ml water at 1:16).
2. Grind your coffee—most pour-over methods work well with a medium-fine grind, around 20 on a Baratza Encore or equivalent.
3. Bloom the coffee with a small amount of water (twice the coffee weight, e.g. 30ml for 15g) for 30 seconds.
4. Pour the remaining water gradually, aiming to finish your total brew volume (e.g. 240ml) within 2:30 to 3:30 minutes.
5. Taste and adjust—too strong? Use more water next time. Too weak? Use more coffee or a finer grind.

Different Methods, Same Ratio Principles

While 1:15 to 1:18 is the SCAA’s recommended range for most drip-style and immersion brews, different methods might nudge you toward one end of the spectrum or the other:

• Pour-over (e.g. V60, Chemex, Kalita Wave): Often 1:15 to 1:17. A brighter, cleaner cup.
• French Press: Usually closer to 1:12 to 1:15 for a heavier body and more extraction.
• AeroPress: Flexible, but many use 1:12 to 1:16 depending on steep time and filter type.
• Cold Brew: Generally 1:4 to 1:8, but that’s a long, cold extraction—very different chemistry.

Why Grinding Size and Time Also Matter

Your ratio sets the foundation, but grind size and brew time critically influence how that coffee extracts. A too-coarse grind with a high ratio might under-extract, tasting sour and weak. A too-fine grind can over-extract, leading to bitterness even at a 1:18 ratio. Aim for total brew times between 2:30 and 4:00 depending on method, and adjust grind to fit—not the other way around.

Frequently Asked Questions

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

The SCAA recommends a coffee-to-water ratio between 1:15 and 1:18. That means for every gram of coffee, you use between 15 to 18 grams (millilitres) of water. For a standard 240ml cup, this equals roughly 13 to 16 grams of coffee.

Is 1:16 a good coffee ratio?

Yes, 1:16 is widely regarded as an excellent, balanced brewing ratio. It sits comfortably within the SCAA’s recommended 1:15 to 1:18 range and works well for most pour-over and drip methods, producing a cup that’s neither too strong nor too weak.

What is the difference between 1:15 and 1:18 coffee ratios?

A 1:15 ratio uses more coffee per unit of water, resulting in a stronger, more intense cup. A 1:18 ratio uses less coffee, producing a lighter, more delicate brew. Both are within the SCAA’s recommended range, and the best choice depends on your taste preference.

Should I use 1:15 or 1:17 for pour-over?

Both are excellent choices. Many pour-over enthusiasts prefer 1:15 to 1:17 depending on the coffee and roast level. A 1:15 ratio highlights body and sweetness, while 1:17 enhances clarity and acidity. Use 1:16 as a reliable middle ground.

Does the SCAA ratio work for all brewing methods?

The 1:15 to 1:18 ratio is ideal for drip, pour-over, and similar methods. However, immersion methods like French Press may use 1:12 to 1:15, and cold brew often uses 1:4 to 1:8. The principle remains: adjust based on method, but start with the recommended range for your brew type.

Recommended FrontStreet Beans for SCAA Ratios

For exploring SCAA-standard brewing ratios, try FrontStreet’s BrazilBourbon for a smooth, medium-bodied cup with nutty sweetness; the ColombiaSidra offers tropical sweetness with juicy complexity thanks to its Sidra variety and double anaerobic processing; and the EthiopiaYirgacheffeGedeb brings bright citrus and floral tones ideal for testing light to medium brew ratios. These beans showcase how different origins and processes perform within the 1:15–1:18 range. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.