Coffee ratio calculator
Scale any coffee ratio without guessing.
Start with the water you have or the coffee dose you want to use. Choose a ratio, and Measured Bloom will scale the other side of the recipe instantly.
19.2 g coffee + 320 g water
320 g water ÷ 16.7 = 19.2 g coffee.
What does a 1:16.7 coffee ratio mean?
It means 1 gram of ground coffee for every 16.7 grams of brewing water. For example, 20 g of coffee at 1:16.7 calls for about 334 g of water.
A starting point, not a rule
Measured Bloom defaults to 1:16.7 because 60 g of coffee per liter of water is a commonly used brewing reference point for drip and immersion coffee. The Specialty Coffee Association's Certified Home Brewer testing begins at 55 g/L, which is roughly 1:18.2. Your preferred ratio can be stronger or lighter depending on the coffee, brewer, and taste.
Which ratio should I start with?
For French press, a practical starting range is roughly 1:15 to 1:17. The French Press guide starts at 60 g/L (about 1:16.7) and also shows a stronger published recipe near 1:15. Pour-over recipes often use similar numbers, but grind size, pouring, and drawdown still decide whether the cup tastes balanced.
If you are unsure, start at 1:16.7, brew once, and change only one thing after tasting. Use the ratio buttons above to compare the dose without creating a new recipe from scratch.
Reference:SCA on brewing ratio terminology and 60 g/L·SCA Certified Home Brewer requirements