BREWING

What is the ideal coffee to water ratio?

Quick answer

The ideal coffee to water ratio is generally between 1:15 and 1:17, meaning one gram of coffee for every 15 to 17 grams of water. This range, often referred to as the "golden ratio," provides a balance between strength and flavor extraction. You can adjust this brewing ratio based on your personal preference for a stronger or lighter cup.

The real story

Brewing coffee is, at its heart, an exercise in chemistry. The coffee to water ratio is the foundational variable that determines the intensity and balance of your beverage. By using a scale to measure both your coffee dose and your water weight, you remove the guesswork from the process, ensuring your brewing consistency from one morning to the next.

The 1:15 to 1:17 ratio is a starting point, not a strict law. A ratio of 1:15 (e.g., 20 grams of coffee to 300 grams of water) will yield a more concentrated, punchier cup, which is often preferred for brewing methods like the French Press or pour-over brewers that emphasize body. Conversely, a 1:17 ratio will result in a lighter, more delicate cup, often ideal for highlighting the subtle, nuanced acidity of high-quality, light-roast single origin coffees.

If your coffee tastes thin or watery, your ratio is likely too high (too much water, too little coffee). If it tastes overwhelming, intensely bitter, or syrupy, your ratio might be too low (too much coffee for the amount of water). It is important to note that this ratio is distinct from extraction, which is how much flavor you pull from the grounds. You can have a perfect ratio but still have an under-extracted, sour cup if your grind size is too coarse.

Consistency is achieved by keeping your ratio constant while adjusting other variables like grind size or water temperature. If you want to change the strength of your brew, stick to your chosen ratio and adjust your grind size to influence the flavor. If you find the flavor balance is correct but the intensity is just not what you want, *then* you can slightly adjust your ratio up or down.

In practice, starting with a 1:16 ratio is a reliable way to experience the intended character of most specialty coffees. Use a digital scale to track these measurements. Once you find a ratio you enjoy, you can lock it in as your baseline, allowing you to confidently explore new coffee origins without having to rethink your recipe every time.

Sources we lean on
  • · https://sca.coffee/
  • · https://ncausa.org/