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Coffee Ratio Calculator
Get the grams of coffee for your water at any brew ratio.
Coffee
—
Grams of coffee.
| Tablespoons | — |
|---|---|
| Water | — |
| Ratio | — |
| — |
Show our math
Enter your figures above to see the step-by-step working.
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How the Coffee Ratio Calculator Works
Great coffee comes down to the ratio of coffee to water. A common starting point is 1:16 — one gram of coffee for every sixteen grams (millilitres) of water — which the Specialty Coffee Association calls the golden ratio. This calculator takes your water amount and ratio and tells you exactly how much coffee to grind.
A lower number (1:15) makes a stronger brew, a higher one (1:17–18) a lighter cup. Weighing coffee is far more consistent than scooping, since bean density varies.
coffee (g) = water (g) ÷ ratio
Frequently Asked Questions
What is a good coffee-to-water ratio?
1:16 is the classic golden ratio — 1 g of coffee per 16 g of water. Use 1:15 for stronger, 1:17 for lighter.
How much coffee for 500ml of water?
At 1:16, about 31 grams — roughly six tablespoons of ground coffee.
Why weigh coffee instead of scooping?
Bean size and grind change how much a scoop holds; weighing gives the same strength every time.
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