Coffee Ratio Calculator
Enter water and a brew ratio to get the grams of coffee to use.
Dial in your brew ratio
Great coffee comes down to a consistent ratio of coffee to water, and weighing beats scooping every time. Enter the water you are brewing with and your target ratio, and this returns the grams of coffee to grind.
At the popular 1:16 ratio, 500 g of water calls for about 31 g of coffee. Tighten the ratio to 1:15 for a stronger cup or open it to 1:17 for something lighter — the coffee weight updates as you go.
Simple and private
It divides the water weight by your ratio in your browser, so it responds instantly and nothing you enter is uploaded.
Frequently Asked Questions
What ratio should I use?
A 1:16 coffee-to-water ratio is a common starting point; 1:15 is stronger and 1:17 lighter. The tool takes any ratio you set.
How is coffee weight found?
Coffee grams equal the water in grams divided by the ratio. For 500 g water at 1:16 that is about 31 g of coffee.
Are grams and millilitres the same for water?
Close enough for brewing — one millilitre of water weighs about one gram, so you can measure water by volume and treat it as grams.
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