Espresso Coffee Water Ratio. When cupping, the ratio of 8.25 grams (whole bean) coffee (± 0.25 grams), to 5.07 fluid ounces (150 ml) water shall be used. An ideal ratio would be between 1:1 and 1:3.
Avoid distilled or softened water. This means a greater chance of saturated grounds, so you’ll need plenty to get an acceptable flavor. The ideal water temperature at the grouphead of the espresso machine should be between 195 °f / 91 °c to 203 °f / 95 °c, with a target temperature for most coffees of 200 °f / 93 °c.brew ratio, coffee roast level, coffee varietal, and processing all can have an effect on the optimal brew temperature.
The ristretto shot is also known as a restricted shot, and typically features a brew ratio between 1:1 and 1:1.5.
I use a 1:19 ratio coffee to water ratio…or for you mathematically challenged, that’s 13.5gr coffee and 260gr water. This is because espresso machines rely on a very short extraction time, usually around 20 seconds. Depending on if you’d like to make a concentrate or a light beverage, you’ll have to use more or less coffee, respectively. The “best” brew ratio will depend on a lot of factors.