If your coffee tastes weak, watery, or bizarrely bitter, the ratio of coffee to water is usually the first thing to check — before you blame your beans or your grinder.
The starting point
A good general-purpose ratio for most brewing methods is:
- 1:16 (1 gram of coffee to 16 grams of water) as a balanced, everyday starting point
- 1:15 for a stronger, more concentrated cup
- 1:17–1:18 for a lighter, more delicate cup
For example, 20 grams of coffee at a 1:16 ratio needs 320 grams (roughly 320 ml) of water. Our coffee ratio calculator does this both ways — from a coffee weight, or backwards from the amount of water you want to end up with.
Why weighing matters
Scooping coffee with a spoon is inconsistent — bean density varies, and a “scoop” can swing by several grams. A cheap kitchen scale removes that variable entirely, which is why most serious home brewers weigh both coffee and water.
Adjusting from there
- Brew at 1:16 and taste it.
- Too weak or sour? Use less water next time (try 1:15).
- Too strong or bitter? Use more water next time (try 1:17).
Once you land on a ratio you like, write it down. See our French press ratio guide for a method-specific starting point.
