Coffee to water ratio calculator

Scale a coffee recipe using the ratio you choose.

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Coffee weight (g)

Water-to-coffee ratio

Answer

…

Water weight = coffee weight × the water-to-coffee ratio. A 1:16 ratio means 16 grams of water per gram of coffee.

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Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

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Formula and assumptions

The default is an editable recipe example, not a claim of the best ratio. This is brew-water input; absorbed water means beverage yield will differ.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Coffee to water ratio calculator

Water weight = coffee weight × the water-to-coffee ratio. A 1:16 ratio means 16 grams of water per gram of coffee.

The default is an editable recipe example, not a claim of the best ratio. This is brew-water input; absorbed water means beverage yield will differ.

Next: Dough hydration calculator

A worked example

With coffee weight (g) = 20, water-to-coffee ratio = 16, the water needed (g) is 320.

Next: Ratio calculator

Before you use the result

The default is an editable recipe example, not a claim of the best ratio. This is brew-water input; absorbed water means beverage yield will differ.

Example results for coffee weight (g)

These examples use Water-to-coffee ratio: 16. They are reference calculations, not recommended settings.

Coffee weight (g)	Water needed (g)
10	160
20	320
40	640

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