Understanding the Coffee Ratio Calculator
Great coffee comes down to the ratio of coffee to water. This calculator gives you the right amount of grounds for the volume of coffee you want to brew, so you can dial in a consistent, balanced cup every time instead of guessing by the scoop.
The golden ratio
A widely used starting point is the “golden ratio” of about 1 gram of coffee to 15–18 grams of water, often written as 1:15 to 1:18. A lower ratio (more coffee) gives a stronger, bolder cup; a higher ratio gives a lighter brew. The calculator does the math so you can scale precisely from a single mug to a full carafe.
Dialing in your taste
Ratio is the foundation, but grind size, water temperature, and brew time also shape the flavor. Once you find a ratio you like, keep it consistent and adjust the other variables. Weighing your coffee and water with a scale, rather than using volume scoops, is the single biggest upgrade most home brewers can make.
Tips & things to know
- •Start around 1:16 and adjust to taste.
- •Weigh coffee and water for consistency.
- •More coffee per cup = stronger; more water = lighter.