Dial in the perfect brew. Choose your method, set your ratio, and get exact gram and ml measurements.
Every brew method has an ideal ratio range. Pour over and drip coffee work best between 1:15 and 1:17, with the Specialty Coffee Association recommending about 1:16.7. French press uses a coarser grind and slightly stronger ratio of 1:12 to 1:15. Espresso is dramatically different, typically 1:1.5 to 1:2.5 (dose to yield in the cup), producing a concentrated shot.
Cold brew concentrates use very strong ratios like 1:4 to 1:8 because the cold water extraction is less efficient. The concentrate is then diluted 1:1 with water or milk before drinking. AeroPress is flexible and can range from espresso-like concentrations to regular filter coffee depending on grind, time, and water volume.
A lower ratio number (like 1:12) means more coffee per unit of water, producing a stronger, more concentrated cup. A higher ratio (like 1:18) means less coffee per unit of water, producing a lighter, more delicate cup. The "right" ratio depends on your beans, roast level, grind size, and personal preference. Start at the standard for your method and adjust by 0.5 in either direction until you find your sweet spot.