Coffee Brewing & Grind Size Calculator

How to calculate the Golden Ratio?

The Specialty Coffee Association (SCA) recommends a "Golden Ratio" of 55 grams of coffee per 1 liter (1,000ml) of water for optimal extraction. This provides a clean and balanced flavor profile that highlights the coffee's origin.

Coffee (g) = Water (ml) / 16.67

Using the Grind Calculator: An Example

To illustrate how this works, consider a V60 pour-over using 300ml of fresh water. Using the calculator or the manual formula ensures you don't end up with coffee that is too weak or too strong.

Step-by-step calculation:

1. Select V60 (Medium grind)
2. Set water to 300ml
3. Calculate 300 / 16.6 = 18g of coffee
4. Aim for a 3-minute total draw-down time

Frequently Asked Questions

What if my coffee tastes too bitter?
If it is bitter, your grind is likely too fine; try a coarser setting to speed up the water flow.

What if it tastes sour?
Sourness indicates under-extraction; try a finer grind to slow down the water flow.

Does water temperature matter?
Yes, aim for 195°F to 205°F for optimal flavor extraction.