Coffee Brew Ratio Calculator
Plan coffee and water quantities from a brew ratio.
Your inputs
Calculation results
Formula & assumptions
Water mass = coffee mass × ratio; water volume uses 1 gram ≈ 1 milliliter.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Coffee Brew Ratio Calculator
Plan coffee and water quantities from a brew ratio.
- Enter coffee mass, water per gram coffee, cups using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Coffee mass: 20 grams Water per gram coffee: 16 ratio Cups: 2 cups Water · grams: 320 Water · milliliters approximately: 320 Coffee per cup · grams: 10 Water per cup · milliliters approximately: 160
Questions & answers
What does Coffee Brew Ratio Calculator calculate?
Plan coffee and water quantities from a brew ratio.
Which units should I enter?
Coffee mass uses grams. Water per gram coffee uses ratio. Cups uses cups. Convert values to these units before calculating.
Which formula does it use?
Water mass = coffee mass × ratio; water volume uses 1 gram ≈ 1 milliliter.
What does the included example show?
Coffee mass: 20 grams; Water per gram coffee: 16 ratio; Cups: 2 cups. Result: Water · grams = 320; Water · milliliters approximately = 320; Coffee per cup · grams = 10; Water per cup · milliliters approximately = 160.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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