How much coffee grounds per cup of water?

Achieving the perfect cup of coffee often feels like a mystery, but it is rooted in the simple science of the brewing ratio. The Specialty Coffee Association (SCA) established the 'Golden Ratio' as a benchmark for a balanced, well-extracted cup. This ratio—1:15 to 1:18—provides a reliable framework for home brewers to move away from guesswork and toward precision. When you use a scale to measure your coffee and water, you eliminate the inconsistencies inherent in using scoops or tablespoons, which can vary wildly based on the roast level and grind size of your beans.

In practice, the ratio you choose acts as a dial for strength. A 1:15 ratio will yield a more concentrated, intense cup, while a 1:18 ratio produces a lighter, more delicate brew. Most drip coffee enthusiasts find their 'sweet spot' around 1:16 or 1:17. If you are brewing for a standard 6-ounce cup, aiming for roughly 10 to 12 grams of coffee is a great starting point. However, always check your coffee maker's actual capacity, as many machines define a 'cup' as 5 ounces, which can lead to weak, watery coffee if you follow generic instructions.

Beyond the math, your chosen brewing method dictates how you should apply these ratios. Methods with longer contact times, like the French press, often benefit from ratios closer to 1:15, while pour-over methods might lean toward 1:16 or 1:17 to highlight clarity and acidity. Espresso, by contrast, uses a much tighter ratio, often around 1:2, because the high pressure extracts flavor much more efficiently than gravity-fed methods.

Ultimately, the best coffee recipe is the one that tastes best to you. Start with the 1:16 ratio as a baseline, then adjust by a gram or two in either direction based on your palate. If your coffee tastes bitter or harsh, you may be over-extracting; if it tastes sour or thin, you may be under-extracting. By keeping your ratio consistent, you can isolate other variables like grind size and water temperature to truly master your morning brew.