Coffee to Water Ratio Calculator
Scoops are not a recipe. A heaped tablespoon of dark-roasted coffee weighs differently from a tablespoon of a light roast, and neither one tells you what yield you’ll pull from your espresso. Grams are the only way to brew consistently. This coffee to water ratio calculator gives you exact amounts for five brewing methods: espresso, pour over, French press, drip, and cold brew. Tell it how much you want to make and it works backwards from established, industry-standard ratios to the dose you need. Takes about three seconds.
Ratio options for 36g yield
Ristretto
1:1.5
24g coffee
36g yield
Standard
1:2
18g coffee
36g yield
Lungo
1:2.5
14.4g coffee
36g yield
Espresso ratio is measured as dose to yield. A 1:2 ratio means 18g of ground coffee produces 36g of liquid espresso. Ristretto (1:1.5) pulls shorter and more concentrated; lungo (1:2.5) pulls longer and lighter. All three start from the same dose weight — only the yield changes.
Adjust any input above to recalculate instantly.
Coffee to Water Ratios Explained
Every brew method has a ratio that works as a starting point, not a law. Espresso runs at 1:2 (dose to yield), meaning 18g of coffee produces 36g of liquid. Pour over sits at 1:16 to 1:17 — one gram of coffee per 16 or 17 grams of water. French press uses 1:15, slightly stronger to account for full-immersion extraction with a coarser grind. Drip machines follow the SCA Golden Ratio of 1:16. Cold brew concentrate comes in at 1:8, which you dilute before serving.
These ratios come from the Specialty Coffee Association and decades of professional calibration. They’re starting points, not absolutes. Once you hit the right ballpark, taste is the final calibration tool. A shot that tastes too bitter at 1:2 might improve at 1:2.2. A pour over that tastes thin at 1:17 might need to come down to 1:15. The calculator gets you there faster than guessing.
For espresso specifically, the ratio matters alongside grind size, dose, and pressure — changing the ratio without adjusting grind often just moves one problem to another. Our how to use an espresso machine guide covers the full dialling-in process if you want to go deeper than ratio alone.