Drip / Filter
1:16
Trusted by coffee enthusiasts & baristas
Perfect Coffee,
Every Brew
Calculate the exact coffee-to-water ratio for any brew method: drip, pour over, espresso, cold brew, and more.
Weight-based ratios you can tune to taste
Coffee Ratio Calculator
Weight-based ratios you can tune
Weight-based starting ratios Free, no signup
Common brew ratios
A starting point for every method
Common starting ratios by method. Adjust to taste once you have a baseline.
Pour Over
1:16
French Press
1:14
Espresso
1:2
Cold Brew Conc.
1:5
AeroPress
1:13
Browse by brew method
More free tools
Dial in espresso. Keep a brew log.
Every tool runs in your browser. No account, no data leaves your device.
Espresso Dose & Yield
Dose, yield and brew ratio
Brew Log
Track brews, compare changes
Collections
One topic, covered end to end
Guides & methods
How each method works
Steps you can follow, with sources you can check.
Why a Scale Beats an Expensive Brewer
A scale measures what ratios need; an expensive brewer cannot fix an unmeasured dose.
Coffee Dosage Basics: Grams, Not Scoops
A scoop is inconsistent; grams are the unit ratios are built on.
Coffee-to-Water Ratio Explained: How to Calculate It
How the coffee-to-water ratio works, the formula, and a worked example.
How Much Coffee for 500ml, 750ml, and 1L of Water?
Coffee grams needed for 500ml, 750ml, and 1L at common ratios.
Pour Over vs. French Press Ratios: Why They Are Not Interchangeable
Why the same coffee-to-water ratio tastes different across brew methods.
How to Change One Brewing Variable at a Time
A repeatable method to improve your coffee by changing one thing per brew.
The basics
What is a coffee ratio calculator?
A ratio calculator takes the guesswork out of brewing by telling you exactly how much coffee to use for the amount of water you have. The core calculation is simple: coffee (g) = water (ml) ÷ ratio. The ratio varies by brew method, and that is where most home brewers go wrong.
Every result includes a grind recommendation and a practical brew tip, so you know how to use the number rather than just what it is.
- Free, weight-based tools with on-page tuning
- Method presets with cited starting points
- No account, no tracking of your brews
7Brew methods
3Free tools
1:16Common baseline
0Signups required
In depth
How to use & how we calculate
How to use this coffee ratio calculator
Pick a brew method, then choose whether you know your water amount, your coffee amount, or how many cups you want. Enter the number and the calculator returns the matching value plus a ratio you can reuse.
How we calculate your brew ratio
We use weight-based ratios: coffee (g) × ratio = water (ml). Each method has a typical starting range; strength adjusts within that range — lighter settings add water, stronger settings reduce it.
Why should I use a scale instead of tablespoons?
Volume measurements vary with grind size, roast density and how the scoop is filled. A 0.1 g scale removes that variance and makes a recipe repeatable.
What grind size should I use for each method?
Coarse for French press and cold brew, medium for drip, medium-fine for pour over and AeroPress, fine for espresso and Moka pot. The result panel shows the recommendation for the selected method.
OneCup Coffee Lab Team
We are coffee enthusiasts who built a brewing calculator we actually use every morning. Our formulas use common weight-based ratios with method-specific starting ranges.