Coffee Brewing Ratio Calculator
Achieve the perfect golden cup every single time.
Your Brewing Blueprint
Coffee Grounds
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Water Required
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Understanding Coffee Ratios
The secret to a great cup of coffee isn't just the beans; it's the mathematical relationship between water and coffee grounds. This is known as the Brewing Ratio. Using a scale and a calculator ensures that your coffee is neither too weak (under-extracted) nor too bitter (over-extracted).
Common Coffee Ratio Guide
- 1:1 to 1:3 – Espresso (Intense, concentrated)
- 1:10 – Cold Brew Concentrate (Very strong, meant for diluting)
- 1:15 – Aeropress / Strong Pour Over (Full-bodied, bold)
- 1:16 to 1:17 – The "Golden Ratio" (Balanced, highlight's bean notes)
- 1:18 – French Press / Light Drip (Milder, tea-like clarity)
Practical Example
If you are using a standard 12oz mug (approx 355ml) and you want a standard balanced cup (1:16 ratio):
- Input 355ml into the water field.
- Set the ratio to 16.
- The calculator will tell you to use 22.2 grams of coffee.
How to Use This Calculator
Simply enter the total amount of finished coffee you want to drink. Choose your unit (milliliters or ounces). Adjust the ratio based on your preference—smaller numbers result in stronger coffee, while larger numbers result in a lighter brew. Our calculator accounts for standard density to provide the most accurate measurements for your morning routine.
Frequently Asked Questions
Does the grind size change the ratio?
No, the ratio stays the same regardless of grind size, but the grind size affects the contact time. Fine grinds extract faster than coarse grinds.
Should I weigh coffee in grams or spoons?
Always use a scale. A "tablespoon" of dark roast coffee weighs significantly less than a tablespoon of light roast coffee because dark roasts are less dense.