Filter Brew Ratio: 1:18 Commercial Espresso Ratio:1:2 Filter Brew Time:Less than 2-minutes (depending on brew method). This means that for every gram of ground coffee added into the filter there is 18 grams of hot water. If using a plunger/French press you can add two tablespoon’s of ground coffee (approximately 14-grams), mixed with 250ml of hot water. Still stuck? Check out this link to learn more about brew ratios - click here.