BREWKIND / 01
Coffee-to-water ratio
Choose a coffee-to-input-water ratio and calculate in either direction, using grams throughout.
Coffee-to-water ratio
Choose a coffee-to-input-water ratio and calculate in either direction, using grams throughout.
Example ratios are starting points, not a standard or a flavor guarantee.
Only this button saves to localStorage. Maximum 10 recipes, shared by both languages.
Input brewing water
This is input water, not the final drink. Grounds retain water. A scale gives mass directly; mL ≈ g is only an approximation for ordinary water.
The calculation
Input water = dry coffee × ratio denominator. Dry coffee = input water ÷ denominator. A ratio of 1:16 means 16 g input water per 1 g dry coffee. Grams measure mass. For ordinary brewing water, 1 mL ≈ 1 g is only a convenient approximation; a scale avoids density assumptions.
Your recipe notebook 0/10
Save a recipe when it is ready. It will stay in this browser; export JSON or CSV for your own backup.
A weekday filter recipe
At 1:16, 20 g of dry coffee calls for 320 g of input water. Starting with 300 g of water at the same ratio calls for 18.75 g of coffee. The collected drink will usually weigh less than the input water.
How it works ↗Four ways to make the numbers clear.
Batch brew planner
Scale your brewing water for a shared pot and split it into a pour-by-pour plan.
Open tool↗Espresso ratio
Calculate dry coffee dose, beverage yield or their ratio. Keep shot time with your recipe.
Open tool↗Coffee dilution
Use a measured starting TDS and a target TDS to calculate how much water to add.
Open tool↗A few useful answers
Understand the numbers. Keep your own taste.
Will this tell me the best ratio?＋
No. Ratios, pour splits and times are user choices. The presets are editable examples, not universal recipes or a promise of extraction or flavor. Adjust to your coffee, grinder and brewer.
Does 600 g of brewing water make 600 g of coffee?＋
Not necessarily. Grounds retain water, and evaporation and equipment also affect the collected drink. The batch planner scales input water and does not predict final beverage volume.
Can I estimate TDS from the brew ratio?＋
Brew ratio alone does not provide measured strength. Use an appropriate coffee refractometer and its measurement procedure for a real TDS result. The dilution example is illustrative.
Where are my saved recipes?＋
Only in localStorage for this site in this browser. Saving is optional and happens when you press Save recipe. There is no cloud sync. Export a backup before clearing browser data.