Getting your coffee-to-water ratio right is one of the simplest ways to instantly improve your brew.
This calculator helps you dial in the right balance based on your brewer, strength preference, and brew size, so you can skip the guesswork and get a better cup every time.
Coffee-to-Water Ratio Calculator
This coffee-to-water ratio calculator is built using real brewing ranges used by professional baristas and specialty coffee standards.
At the core is the Specialty Coffee Association’s “golden ratio” of around 1:15 to 1:17, which is widely considered the sweet spot for balanced extraction. From there, the calculator adjusts based on your brew method, strength preference, and technique.
Each brewer uses slightly different variables. A Chemex benefits from a coarser grind and longer brew time, while a V60 typically uses a finer grind and faster drawdown. Espresso is even more precise, with ratios like 1:2 for a standard shot, 1:1 for a ristretto, and 1:4 for a lungo.
Instead of giving you a single generic number, this tool adapts those proven ranges to match how people actually brew coffee in the real world.
The goal is simple. Help you get to a balanced, great-tasting cup faster, whether you’re just starting out or dialing in your setup.