Calculate precise coffee-to-water ratios for any brew method. Trusted by 4,217 baristas and home brewers worldwide.
Enter your coffee weight or water volume and select a brew method to get exact ratios and estimated brew time.
Three steps to a perfectly calibrated brew, every time.
Input the weight of ground coffee you plan to use, in grams. Precision here determines everything downstream.
Select your brew method and preferred strength level. Each method uses scientifically validated ratio ranges.
Get water volume, brew time, temperature, and TDS targets instantly. Copy results to your recipe notes.
Evidence-based guides on extraction science, brew methods, and water chemistry.
Why your TDS meter reading matters more than brew time alone, and how to dial in extraction percentage.
Comparing how filter geometry and drawdown speed affect optimal dose and water volume for each brewer.
Hard vs. soft water behaves differently during extraction. Understanding mineral balance improves every cup.
Professionals and home brewers rely on CoffeeRate for consistent results.
"The ratio calculator saved me hours of trial-and-error when dialing in a new single-origin. Results match my refractometer readings within 0.1%."
"I train new staff with CoffeeRate. The brew time estimates are accurate enough that trainees learn to trust process over guesswork."
"Solid tool for home brewing. The TDS target range helped me understand why my previous ratios were producing flat cups."
A brew ratio is the proportion of ground coffee to water by weight. A 1:16 ratio means 1 gram of coffee for every 16 grams of water, which is a common starting point for filter coffee.
Most specialty coffee professionals recommend between 1:15 and 1:17 for pour over. The optimal value depends on roast level, grind size, and personal preference for strength.
TDS (Total Dissolved Solids) measures concentration of dissolved coffee compounds. Combined with brew ratio, it allows calculation of extraction yield — the percentage of coffee mass extracted into the cup.
Temperature affects extraction rate, not the ratio itself. However, lower temperatures require finer grinds or longer contact time to achieve similar extraction yields to hotter water.
For espresso, use the dedicated Espresso Extraction Tool on this site. Espresso ratios (typically 1:1.5 to 1:3) and parameters differ significantly from filter methods.
Yes. All tools on CoffeeRate are freely accessible without registration or subscription. We believe professional-grade brewing knowledge should be available to everyone.