What is the best ratio for pour over coffee?

In the world of coffee brewing basics, the coffee to water ratio is the most fundamental variable you can control. While many home brewers rely on scoops or tablespoons, using a digital scale to measure by weight is the only way to ensure consistency. A ratio of 1:16—using 1 gram of coffee for every 16 grams of water—is widely considered the 'sweet spot' for pour over coffee, offering a clean, nuanced cup that allows the unique characteristics of the origin to shine.

Why does this range matter? The ratio dictates the strength of your brew, often measured as Total Dissolved Solids (TDS), and influences the extraction yield. If you use too much water (a higher ratio like 1:20), you risk over-extracting the coffee, which can lead to thin, bitter, or astringent flavors. Conversely, using too little water (a lower ratio like 1:12) may result in a syrupy, intense, or under-extracted cup that lacks clarity.

Your choice of roast level should also influence your starting point. Light roasts are often denser and can be more difficult to extract, so a slightly tighter ratio (closer to 1:15) can help pull out more sweetness and complexity. Darker roasts, which are more porous and soluble, often perform better at a slightly wider ratio (closer to 1:17) to avoid excessive bitterness.

Ultimately, this brewing guide is just a starting point. If your coffee tastes sour or weak, try a slightly tighter ratio or a finer grind size. If it tastes bitter or harsh, try a slightly wider ratio or a coarser grind. By keeping your water temperature and grind size consistent, you can use the ratio as your primary dial to unlock the best flavor in every bag of specialty coffee.