Body vs Strength

In the world of coffee, the terms body and strength are frequently conflated, yet they describe two distinct physical properties of your brew. Body refers to the tactile sensation or mouthfeel of the coffee—how it feels physically against your tongue and the roof of your mouth. It is often described using terms like thin, syrupy, creamy, or heavy, and is largely influenced by the presence of suspended solids and oils extracted from the bean.

Strength, by contrast, is a measure of the concentration of dissolved coffee solids in the final beverage. It is a technical metric often quantified by Total Dissolved Solids (TDS). A coffee can be very strong—meaning it has a high concentration of coffee particles—but have a light, tea-like body. Conversely, a coffee can be weak in concentration but possess a heavy, viscous body if it contains high levels of oils or specific compounds.

Understanding this distinction is vital for any home brewer or professional. If you find your coffee tastes 'watery' but has a sharp, intense flavor, you are likely dealing with a low-strength brew that still possesses high acidity. If your coffee feels heavy and coats your mouth but lacks flavor clarity, you may have a high-strength brew that is perhaps over-extracted or simply roasted to a level that emphasizes texture over nuance.

In practice, you can adjust strength by changing your brew ratio—the amount of coffee used relative to the water. You can influence body by changing your filter type; paper filters trap more oils and fines, resulting in a lighter body, while metal filters allow more oils to pass through, increasing the perceived viscosity. Learning to separate these two sensations allows you to diagnose your brewing results with much greater precision.