Coffee to Water Ratio Calculator

Scale a brew by choosing the coffee dose and the ratio of water to coffee, and see how much water to use. Enter coffee and water per 1 g of coffee…

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Daily Uses

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Scale a brew by choosing the coffee dose and the ratio of water to coffee, and see how much water to use. Enter coffee and water per 1 g of coffee to see water and approximate drink volume when you calculate.

Enter your values

Each successful calculation counts toward this tool’s 8 free daily uses. Values stay in your browser.

Worked example

Example calculated from the starting values. Enter your own values and press Calculate to get your result.

Water320 g
Approximate drink volume288 mL

With the default inputs (coffee = 20 g, water per 1 g of coffee = 16 g), the results are: water 320 g; approximate drink volume 288 mL.

Quick reference: coffee vs result

Reference table based on the example values; it is not your calculation result.

Coffee (g)WaterApproximate drink volume
10160 g144 mL
20320 g288 mL
40640 g576 mL
1001,600 g1,440 mL
2003,200 g2,880 mL
4006,400 g5,760 mL

Frequently asked questions

What formula does this calculator use?

Water = cof × ratio; Approximate drink volume = cof × ratio × 0.9. Variables: cof = coffee in g, ratio = water per 1 g of coffee in g.

What do I need to enter?

You need coffee (g), water per 1 g of coffee (g). Results update as you type.

What is an example result?

With the default inputs (coffee = 20 g, water per 1 g of coffee = 16 g), the results are: water 320 g; approximate drink volume 288 mL.

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