Coffee-to-Water Ratio Calculator for Every Brew Size
Plan pour-over, drip, French press, AeroPress, or cold-brew batches by weight with adjustable starting ratios and practical mL, fluid-ounce, and cup equivalents.
A ratio that scales with the batch
A 1:16 brew ratio means one gram of ground coffee for every 16 grams of brewing water. The same ratio works for a single cup or a large batch because both quantities scale together.
Coffee professionals commonly express brewing ratio by weight because a scale avoids ambiguity between cup sizes and makes a recipe easier to repeat.
Start with a method, then taste
The method options supply editable starting ratios. Grind, roast, water, equipment, agitation, contact time, and personal taste can all justify changing the number.
AeroPress and cold-brew recipes vary especially widely because brewers may make a concentrate and dilute it after extraction. The calculator plans input coffee and water; it does not predict final beverage yield.
Examples
Pour-over batch
Input
30 g coffee at 1:16
Show result
Result
480 g, approximately 480 mL, brewing water
Work backward from water
Input
600 g water at 1:15
Show result
Result
40 g coffee
Frequently Asked Questions
What does a 1:16 coffee ratio mean?
Use 16 grams of brewing water for each gram of ground coffee.
Is there one perfect coffee ratio?
No. Ratio is a starting variable alongside grind, water, temperature, contact time, equipment, and taste.
Why are water grams and millilitres the same here?
For practical brewing, the calculator uses the disclosed approximation that one millilitre of water has a mass of one gram.
References
Related Tools
Food
Recipe Scaling Calculator: Resize Ingredients by Servings
Scale pasted recipe ingredients up or down with readable culinary fractions.
Unit Converters
Weight and Mass Converter: kg, lb, oz, g & Stone
Convert milligrams, grams, kilograms, tonnes, ounces, pounds, and stone.
Unit Converters
Volume Converter: Litres, Gallons, Cups & Fluid Ounces
Convert metric, US liquid, and Imperial volume units without mixing measurement systems.
Food
Pasta Calculator
Plan dry or fresh pasta, whole packages, sauce, cooking water, salt, child portions, and intentional leftovers.