How to Calculate Coffee Ratio
What is Coffee Ratio?
A coffee ratio calculator determines the optimal amount of ground coffee relative to water for different brewing methods. The Specialty Coffee Association recommends a "golden ratio" of 1:16 to 1:18 (coffee:water by weight) as a starting point.
Step-by-Step Guide
- 1Ratio = Coffee weight / Water weight
- 2Standard drip: 1:16 (e.g., 30g coffee per 480ml water)
- 3Espresso: 1:1.5 to 1:3 (double shot: 18g in → 36–54g out)
- 4French press: 1:12 for fuller body; cold brew: 1:4 to 1:8
Worked Examples
Input
30 g coffee · 1:15 ratio
Result
450 ml water → strong filter brew
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