Brewing the perfect cup of coffee is a blend of art and science. The finest details can mean the difference between a weak, watery brew and one that is balanced and bold. How did you brew the coffee? What size coffee grounds did you use? What was the temperature of the water? And, crucially, what coffee-to-water ratio did you use?
In drip coffee, the ratio of coffee to water plays a pivotal role in achieving the ideal flavor. In this article, we’ll explore the best drip coffee ratio, how to measure it, and tips to help you consistently brew the perfect cup.
Understanding the Coffee-to-Water Ratio
The coffee-to-water ratio refers to the amount of ground coffee used relative to the amount of water. This ratio determines the strength and flavor profile of your coffee. Coffee is often brewed using a coffee ratio to ensure you achieve a consistent flavor and strength with every cup. Coffee ratios also make it easy to adjust recipes for different quantities, whether you are brewing a single cup or a full pot.
When you are brewing coffee using a ratio, it is essential to use a digital scale to ensure you are weighing your coffee and water precisely. We always recommend brewing coffee based on weight rather than volume as coffee beans have different densities depending on the growing conditions/ roast profile.
Finally, using a coffee-to-water ratio is a good starting point for brewing coffee, but ultimately you need to adjust this to suit your own personal preferences and the specific characteristics of the coffee beans you are using.
The Golden Ratio: 1:18
The “Golden Ratio” for coffee, often cited as 1:18 (or 1 gram of coffee to every 18g of water), is considered ideal for producing a well-balanced cup. This ratio, recommended by the Specialty Coffee Association (SCA), suggests using 55g of coffee per liter of water. However, this ratio is a starting point, and not a one-size-fits-all solution. The SCA recommends a range of ratios (plus or minus 10%) to cater to different tastes and bean characteristics. For darker roasts or those adding milk, a lower ratio (e.g., 1:15) might be more suitable to achieve a stronger flavor.
Here at The Coffee Folk we prefer to brew a slightly more concentrated cup of drip coffee, using a 1:15 brew ratio.
1:15- strong, concentrated cup of coffee (good for darker roasts or if diluting with milk)
1:18- mild, well-balanced cup of coffee
** This golden ratio is recommended for drip coffee, pour over, French press and chemex (not espresso). Espresso, being a highly concentrated coffee, is brewed using a much lower ratio, typically 1:2 **
Adjusting the Ratio for Different Brewing Methods
Different brewing methods and preferences require tweaking the coffee-to-water ratio. Here are the typical coffee ratios we use at The Coffee Folk for our different brewing methods:
Measuring Coffee and Water
When using a brew ratio, it is essential that you are weighing both the coffee and water added. To do this you should invest in a kitchen scale or a coffee scale. This does not have to be a big investment (not everyone needs an Acaia Pearl), there are some great coffee scales available for affordable prices. But we cannot stress enough how important precision is in brewing well balanced and consistent coffee.
No scale?
For those without a scale, the general rule is to use TWO tablespoons of coffee (10g) for every six ounces (180ml) of water. While tablespoons and ounces can be used as rough guides, they are less precise due to variations in grind size and coffee density.
Water Temperature
Unfortunately, brewing the perfect cup of coffee doesn’t just come down to the ideal coffee ratio. One other factor that plays a big part in extraction is the water temperature. The ideal range is typically between 195°F and 205°F, although once again this varies depending on the roast level.
As a general rule of thumb, lighter roasted coffee should be brewed at slightly higher temperatures to prevent sourness, while darker roasts at slightly lower temperature to prevent bitterness.
Tips for Brewing Better Coffee
- Use Fresh Coffee: Always opt for freshly roasted whole beans and grind them just before brewing.
- Invest in a Good Grinder: A burr grinder provides more consistent grind sizes than blade grinders.
- Use Good Water: The quality of water affects coffee flavor. Filtered or bottled water with balanced mineral content is ideal.
- Time Your Brews: Consistency in brewing time leads to consistent flavor. Adjust grind size if brewing time is off.
- Clean Your Equipment: Residual oils and coffee particles can affect the taste of your next brew.
Experiment and Enjoy
The journey to the perfect cup of drip coffee is personal and subjective. Feel free to experiment with different ratios, grind sizes, and brewing times to find what suits your taste best. Remember, the ideal coffee experience is as much about the process as it is about the final cup.
By mastering the coffee-to-water ratio and other brewing variables, you can enjoy a consistently excellent cup of drip coffee, tailored perfectly to your preferences. Happy brewing!
