Dial in your perfect ratio.

How to calculate your coffee-to-water brew ratio

Use the brew ratio calculator to turn any coffee dose into an exact water weight, then adjust the ratio to taste.

1. 1

   Pick what to solve for

   Choose water, coffee or ratio in the calculator depending on which number you already know.

2. 2

   Choose a starting ratio

   Use 1:16 for pour over, 1:15 for French press, 1:14 to 1:16 for AeroPress and 1:5 to 1:8 for cold brew concentrate.

3. 3

   Weigh your coffee

   Weigh the coffee in grams on a digital scale rather than measuring by scoop — bean density varies too much.

4. 4

   Multiply for water

   Multiply the grams of coffee by the ratio to get grams of water. 20 g at 1:16 gives 320 g of water.

5. 5

   Brew and taste

   Brew the recipe, then taste. Weak and watery means lower the ratio; harsh or overpowering means raise it.

6. 6

   Save the recipe

   Note the dose, water weight, grind setting and time so you can repeat the same cup tomorrow.

Learn the technique behind the numbers

The ratio is only half the story. These free guides cover grind size, pour technique and the gear that actually makes a difference.