Coffee Calculator
Calculate the perfect coffee-to-water ratio for your brewing method. Just enter your desired cups and preferred strength.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to use the Coffee Calculator
- Enter the number of cups — Use the Number of Cups field. One standard cup equals 8 oz (240 ml). You can use decimals like 0.5 for half a cup.
- Select your coffee strength — Choose from Mild (1:18), Medium (1:15), or Strong (1:12). This sets the water-to-coffee ratio by weight.
- Click "Calculate" — The result shows the exact grams of coffee needed for your total cups.
- Read the breakdown — Below the result, you'll see the water volume in both ounces and milliliters, the coffee per cup, and the formula used.
Note: All measurements are in grams and milliliters (metric) with ounces provided for reference. The calculator uses weight ratios, so use a kitchen scale for accuracy.
Previous Results
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Frequently Asked Questions
A common starting point is the medium ratio of 1:15 (water:coffee by weight). Adjust to taste: mild 1:18, strong 1:12.
For a standard 8 oz cup, using a 1:15 ratio, you need about 15 grams of coffee.
Yes, this ratio is a good guideline for drip, pour-over, French press, and similar methods. Adjust based on personal preference.