The Brew The tools
Coffee Brew Ratio Calculator
Enter your water or coffee amount and get the exact dose for any ratio, from espresso 1:2 to pour-over 1:16.
Calculate my ratio →
Caffeine Calculator
Estimate the caffeine in your cup by brew method and serving size, and see how it compares to daily limits.
Check my caffeine →
Cold Brew Ratio Calculator
Dial in concentrate or ready-to-drink cold brew with the right coffee-to-water ratio and dilution math.
Plan my cold brew →
Brewing guides
Coffee to Water Ratio Guide
The golden ratios for every brew method, how to adjust strength to taste, and the mistakes that ruin a cup.
Read the guide →
How Much Caffeine Is in Coffee?
Caffeine by brew method, what actually changes the number, safe daily limits, and caffeine half-life explained.
Read the guide →
Coffee Grind Size Guide
A grind chart for every brewer, why grind size controls extraction, and how to troubleshoot a bad cup.
Read the guide →
Why ratios beat recipes
Most coffee recipes tell you "two tablespoons per cup" — which is useless, because a tablespoon of light-roast Ethiopian and a tablespoon of dark-roast Sumatra weigh different amounts, and "a cup" means anything from 5 to 12 ounces depending on who you ask. Ratios fix this. A 1:16 ratio means one gram of coffee for every sixteen grams of water, and it works identically whether you're brewing a single mug or a full pot.
Professional baristas and competition brewers all work in ratios because they're repeatable. Once you find the ratio you like for your brewer — say 1:15 for a punchy pour-over or 1:17 for a mellow French press — you can scale it to any batch size without thinking. That's what these calculators are for: they turn your ratio into grams, milliliters, and tablespoons in one click, so the math never gets between you and a good cup.
Good math deserves good beans
These calculators dial in your brew — but no ratio rescues stale beans. Coffee peaks 4–14 days off roast, so we roast to order at our own roastery, Raven Horse Co, and ship it fresh.