Everyday Drinks
Coffee water calculator
Solve for
Coffee dose
g
Ratio 1 to
Water 320 g
20 g at 1 : 16
Cups of 240 ml 1.33
Ratio 1 : 16
Strength standard
Water grams = coffee × ratio
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320 × 100
Water needed is the coffee dose times the ratio. Twenty grams at 1:16 takes 320 g of water, which brews to about 280 ml in the cup once the grounds have taken their share.
How to work out brew water
1 Weigh your coffee dose.
2 Pick a ratio — 1:16 is a good default.
3 Read the water weight; grams and millilitres are interchangeable for water.
4 Pour in stages for filter methods rather than all at once.
Water quality matters nearly as much as the quantity. Very soft or distilled water extracts poorly and produces flat, hollow coffee, because minerals participate in extraction. Very hard water over-extracts bitter compounds and scales the kettle. A moderate mineral content — roughly 75 to 150 ppm total dissolved solids — is the range specialty brewing standards aim for, which is why some cafés filter and then deliberately remineralise.
Questions
320 g at 1:16, or 300 g at 1:15 for something stronger.
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300 × 250
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