Coffee Strength

Coffee strength is a term that is often misunderstood, frequently confused with bitterness or caffeine content. In the world of coffee science, strength refers specifically to the concentration of dissolved solids in your cup. It is a measure of how much coffee 'stuff' is in the water. A strong cup has a high concentration of solubles, while a weak cup has a low concentration, often described as watery or thin.

Strength is primarily determined by your brew ratio—the amount of coffee you use relative to the amount of water. If you use more coffee for the same amount of water, your strength will increase. If you use less coffee, your strength will decrease. It is important to distinguish this from extraction, which is about the quality and balance of the flavors pulled from the grounds. You can have a very strong cup of coffee that is also very poorly extracted, resulting in a drink that is both intense and unpleasant.

For most coffee drinkers, the ideal strength is a matter of personal preference. Some enjoy a bold, heavy-bodied cup, while others prefer a lighter, more tea-like experience. In the specialty coffee industry, there is a general consensus that the most balanced strength for filter coffee falls between 1.15% and 1.35% TDS (Total Dissolved Solids). This range is often cited as the 'Golden Cup' standard, where the intensity of the coffee is sufficient to provide a satisfying mouthfeel without being overwhelming.

In practice, understanding coffee strength gives you the power to customize your brew. If you find that your favorite coffee tastes too intense, you don't necessarily need to change the beans or the roast; you can simply adjust your brew ratio to lower the strength. Conversely, if you want a more robust cup, you can increase your dose. By separating the concept of strength from the concept of extraction, you gain a clearer understanding of how to manipulate your brewing variables. It allows you to focus on achieving the perfect balance of flavor while simultaneously hitting your preferred level of intensity, ensuring that every cup is tailored exactly to your palate.