How this calculation works
The Coffee-to-Water Brew Ratio Calculator computes exact specialty coffee grounds dosage in grams to achieve balanced extraction and optimal flavor notes for any brew method.
Mathematical formula and logic
Coffee Dose (Grams) = Water Volume (mL) / Brew Ratio. (Note: 1 mL of water = 1 gram of water).
Worked example
Brewing 500 mL of pour-over coffee at a 1:16 ratio requires 500 / 16 = 31.25 grams of medium-ground specialty coffee.
Calculation assumptions
- Water density: 1 mL of water equals 1.0 gram at brewing temperatures.
- Specialty Coffee Association (SCA) Golden Cup Standard guidelines.
Frequently asked questions
What is the SCA Golden Cup Standard ratio?
The Specialty Coffee Association (SCA) recommends 55 to 60 grams of coffee per 1,000 mL (1 Liter) of water, corresponding to a brew ratio between 1:16.6 and 1:18.
Why should I weigh coffee in grams instead of using scoops?
Coffee bean density varies by roast level. Dark roasted beans are less dense and occupy more volume than dense light-roasted beans. A digital gram scale guarantees consistent brew strength every morning.
What water temperature is best for brewing coffee?
Optimal brewing water temperature is between 195°F and 205°F (90°C to 96°C), roughly 30 to 45 seconds off a full rolling boil.
What is the ideal ratio for cold brew concentrate?
A 1:8 coffee-to-water ratio steeped for 16 to 24 hours produces a rich, smooth cold brew concentrate that can be diluted 1:1 with cold water or milk over ice.
What is a double espresso shot ratio?
A modern specialty espresso double shot typically uses a 1:2 ratio (e.g. 18 grams of finely ground coffee yielding 36 grams of liquid espresso in 25-30 seconds).
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