Cold brew uses a much stronger ratio than hot coffee because it is brewed as a concentrate and then diluted. This formula sizes the water for your grounds.
Water (g) = Coffee (g) × Ratio
What the terms mean
| Symbol | Meaning |
|---|---|
| Water | Brewing water, in grams |
| Coffee | Coarse coffee, in grams |
| Ratio | Concentrate ratio, 1:4 to 1:8 |
Worked example
A 100 g dose at a 1:5 concentrate ratio uses 100 × 5 = 500 g of water. Dilute the finished concentrate about 1:1 with water or milk.
Steep then dilute. Steep 12 to 24 hours in the fridge. The concentrate keeps for up to two weeks, and you dilute each glass to taste.
See the Cold Brew Calculator and the How to Make Cold Brew.