Coffee to Water Ratio Calculator
Enter the amount of water or coffee you have and pick a brew method, and get the matching amount in grams for the right strength. Covers drip, pour-over, French press and more. A free coffee to water ratio calculator that runs in your browser, with no sign-up.
- Ingredient-aware accuracy
- 100% free
- No sign-up, no app
- Instant as you type
- Works offline after first load
Using a 1:16 ratio (1 g coffee per 16 ml water).
How to use it
- 1
Pick a brew method
Choose drip, pour-over, French press or another method, each with its usual ratio.
- 2
Enter what you know
Type the water you want to brew, or the coffee you have, and the other is worked out.
- 3
Weigh and brew
Use the gram amounts for a consistent cup, with the approximate cup count shown.
When it comes in handy
Consistent coffee
Hit the same strength every morning by weighing to a ratio instead of guessing scoops.
Scaling a brew
Make one cup or a full pot and keep the proportion right at any size.
Trying a method
Switch from drip to French press and get the ratio that method usually calls for.
Instant, exact & 100% in your browser
The conversion runs right here in your browser using exact, standard factors. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.
Frequently asked questions
- What is a good coffee to water ratio?
- A common starting point is the golden ratio of about 1 gram of coffee to 16 grams of water, written 1:16. Stronger styles use 1:15 or less and milder ones 1:17 or more. The calculator uses a sensible ratio per brew method and you can adjust to taste.
- How many grams of coffee per cup?
- For a roughly 240 ml cup at a 1:16 ratio you need about 15 grams of coffee. Cup sizes vary, so the calculator works from the actual water amount rather than a fixed cup, and shows the approximate number of cups.
- Why weigh coffee instead of using scoops?
- Scoops vary with the grind and how packed they are, so the same scoop can hold quite different amounts. Weighing in grams gives a repeatable result, which is why a ratio by weight is the reliable way to brew.
- Does this work offline and is anything sent to a server?
- The calculation runs entirely in your browser, so nothing you type is sent anywhere, and once the page has loaded it keeps working with no connection. There is no sign-up and no limit on how many conversions you make.
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