Free calculators for coffee brewing, espresso ratios and everyday lifestyle needs. All formulas are transparent and updated for 2026.
Brewing great coffee at home is not about guesswork. The ratio of coffee to water, the grind size, and the brew time all interact to produce the final flavor. A difference of just 1 gram of coffee or 15 grams of water can shift the cup from balanced to bitter or sour. Our calculators use the Specialty Coffee Association (SCA) recommended ranges to give you precise measurements for every brew method, so you get consistent results every time.
Whether you prefer the clean clarity of a pour over (V60, Chemex, Kalita Wave), the full body of a French press, the versatility of an AeroPress, or the intensity of an espresso shot, our calculators cover it all. Each method has its own ideal ratio, grind size, and extraction time. The Brew Ratio Calculator handles filter methods while the Espresso Ratio Calculator focuses on dialing in ristretto, normale, and lungo shots with dose-to-yield precision.
If you enjoy precision in the kitchen, check out our Sourdough Hydration Calculator for perfect bread every time, or our Sourdough Starter Feeding Calculator to maintain a healthy levain. For other lifestyle tools, browse our Plant Watering Calculator and Dog Food Calculator.