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Coffee Calculator

fl oz

Result

Ground Coffee63.1 g
Tablespoons11.5 tbsp
Water Needed32 fl oz (946 mL)
↗ Food

Coffee Calculator Calculate the perfect coffee-to-water ratio for any brew method based on the Golden Ratio standard. — free online calculator.

Formula

Water(mL)=cups×fluid ounces per cup×29.5735295625; coffee(g)=water(mL)/selected water-to-coffee ratio.
  • Coffee Calculator calculates its result from Water Ml, Ratio. It uses the formula Coffee (g) = water (mL) ÷ ratio; Standard ratio = 1:15. Change any input to recalculate the result instantly.
  • The main inputs are Number of Cups, Cup Size, Strength. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Coffee

Inputs
  • Number of Cups: 4
  • Cup Size: 8 fl oz
  • Strength: standard

Using Water Ml = 2, Ratio = 5, the calculated result is 0.0666666667.

Sample result: Calculating…

Frequently asked questions

What does the Coffee calculate?

Coffee Calculator Calculate the perfect coffee-to-water ratio for any brew method based on the Golden Ratio standard. — free online calculator.

Which values should I enter?

Enter Number of Cups, Cup Size, Strength using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Water(mL)=cups×fluid ounces per cup×29.5735295625; coffee(g)=water(mL)/selected water-to-coffee ratio..

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026