Measured BloomBetter coffee. Brighter days.

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.

For brewing water, 1 mL is treated as approximately 1 g.
Lower number = more concentrated. Higher number = less concentrated.
Quick starts
Coffee needed
19.2 g

19.2 g coffee + 320 g water

320 g water ÷ 16.7 = 19.2 g coffee.

Pour-over coffee, scale, beans, and gooseneck kettle in warm natural light
Measure the recipe first. Then adjust by taste.

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 filter-coffee reference point. 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.

Measured Bloom principle: use ratio to set concentration, then change one brewing variable at a time when dialing in taste.
Brewing pour over? Use the Pour-Over Coffee Guide to turn the ratio into a complete starting recipe with grind, temperature, bloom, and pouring steps.

Reference:SCA on brewing ratio terminology and 60 g/L·SCA Certified Home Brewer requirements