Coffee Brew Ratio & Water-to-Coffee Calculator

Calculate golden cup brew ratios (1:15, 1:16), exact coffee grams, water volume, blooming water, grind size, and extraction time for V60, French Press, Chemex, and AeroPress.

Formula

Coffee (g) = Water (ml) / Ratio | Bloom Water = Coffee (g) × 2.5

Source / method note

Based on Specialty Coffee Association (SCA) golden cup brewing ratio standards.

Legal / official rate note

Adjust coffee-to-water ratio slightly based on roast level (light, medium, dark) and personal palate preference.

Frequently Asked Questions

What is the Golden Cup coffee ratio?

The Specialty Coffee Association (SCA) defines the ideal golden ratio as approximately 1:15 to 1:17 (around 55g to 65g coffee per 1 Liter of water).

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