Coffee Ratio Calculator
Work out the right coffee to water ratio and grind amount for pour-over, French press or espresso with this free brewing calculator.
Enter Values
Minimum 0
Minimum 1
How to use this calculator
- Enter the water amount and your ratio (1 : N).
- Read the coffee to use.
How it works
Coffee = water ÷ ratio. A 1:16 ratio with 500 mL water needs about 31 g of coffee.
Worked example
500 mL at 1:16. ≈ 31 g of coffee.
Common mistakes
- Measuring coffee by volume (scoops) instead of weight.
- Forgetting lower ratios (1:14) are stronger, higher (1:18) weaker.
Frequently asked questions
What is a good coffee-to-water ratio?
A common starting point is 1:15 to 1:17 by weight — about 60 g of coffee per litre of water — then adjust to taste.
Should I measure coffee by weight or scoops?
Weight is far more consistent; scoops vary with grind and bean. A kitchen scale gives repeatable results cup to cup.
What's the golden ratio?
Roughly 1:15 to 1:18 (coffee : water). Adjust to taste and brew method.
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Cite this tool
Zerdly. (2026). Coffee Ratio Calculator. Retrieved from https://www.zerdly.com/tools/coffee-ratio-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.