Brew ratio

Brew ratio is the weight of dry coffee grounds compared to the weight of water used to brew it, written as a ratio like 1:16 or 1:15. A 1:16 ratio means 16 grams of water for every 1 gram of coffee. Because it measures by weight rather than volume, it stays accurate no matter what cup or scoop you use.

This number is the fastest way to fix a cup that tastes off. A lower ratio, like 1:14, uses less water relative to coffee and produces a stronger, heavier cup, while a higher ratio like 1:17 stretches the same coffee into a lighter, more tea-like brew. Espresso works on its own much tighter ratio, often close to 1:2, because the water passes through under pressure in a short time instead of steeping.

To use brew ratio well you need a kitchen scale, since scoops and cup markings vary between brands and grind sizes. A common mistake is changing the ratio to fix a problem that is really a grind size or water temperature issue, or forgetting to weigh the water added during a bloom. Write down the ratio that works for your favorite beans so you can repeat it, then adjust it in small steps rather than guessing.