Calculadora de Café (doses)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
café_g = água_ml / proporção | padrão SCA: 1:17,42
About this calculator
The Coffee Calculator (doses) helps you determine the ideal amount of ground coffee and water for your desired number of cups. Simply enter how many cups you want and the coffee-to-water ratio (default 1:15, adjustable). The calculator automatically converts to grams of coffee and milliliters of water, assuming a standard cup size of 180 ml. Ideal for consistent flavor, whether using a pour-over, French press, or espresso.
The calculation is straightforward: multiply the number of cups by 180 ml to get total water volume, then divide by the chosen ratio (e.g., 15) to find coffee grams. For example, for 2 cups at 1:15: water = 360 ml, coffee = 360 ÷ 15 = 24 g. The calculator does this instantly, allowing fine adjustments to suit your taste.
Use this tool daily to avoid waste or weak coffee. It's helpful for beginners needing a reference and for enthusiasts experimenting with different ratios (like the SCA recommendation of 1:17.42). It also helps plan coffee for events, ensuring the right amount for guests without leftovers or shortages.
Caution: the ideal ratio varies by brewing method and grind size. Finer grinds (espresso) require different ratios (1:2 to 1:4), while infusion methods (drip, French press) work well with 1:15 to 1:18. The calculator uses a 180 ml cup as standard; adjust if your cup is different. Always weigh coffee on a scale for best accuracy.
Frequently asked questions
What is the ideal ratio for drip coffee?
For drip coffee, the most common ratio is 1:15 to 1:18 (coffee:water). Start with 1:15 and adjust to taste.
How many grams of coffee for 1 cup?
Using the standard 1:15 ratio and a 180 ml cup, you need 12 grams of ground coffee (180 ÷ 15).
Does the calculator work for espresso?
Yes, but the espresso ratio is different (1:2 to 1:4). Adjust the ratio manually in the calculator for correct results.
Can I use different cup sizes?
Yes, but the calculator uses 180 ml as default. If your cup is different, adjust mentally or use the desired total water volume in ml.
Do I need to weigh the coffee or can I use spoons?
We recommend weighing for accuracy, as density varies. A level tablespoon holds about 10 to 12 grams, but weight can vary.