Ultimate Coffee Brewing Ratio Calculator
Achieve the "Golden Ratio" for the perfect cup of coffee every time.
Understanding the Coffee-to-Water Ratio
The secret to a great cup of coffee isn't just the quality of the beans or the expensive equipment; it is the precision of the coffee-to-water ratio. This ratio determines the strength, body, and flavor extraction of your brew. Whether you are using a V60, Chemex, French Press, or Aeropress, getting the math right is the first step toward consistency.
What is the Golden Ratio for Coffee?
The Specialty Coffee Association (SCA) suggests a ratio of 1:18 (55 grams of coffee per 1000ml of water) as the Golden Cup Standard. However, most specialty coffee enthusiasts prefer a range between 1:15 and 1:17 depending on the brewing method.
| Method | Recommended Ratio | Flavor Profile |
|---|---|---|
| French Press | 1:12 to 1:15 | Heavy body, intense flavor |
| Pour-over | 1:15 to 1:17 | Balanced, clear tasting notes |
| Auto-Drip | 1:16 to 1:18 | Classic, mellow profile |
| Cold Brew | 1:4 to 1:8 | Concentrate, smooth |
How to Use This Calculator
Our calculator helps you work backward from whatever measurement you have available:
- Know your coffee amount? Enter the grams of coffee you have left in your bag to find out exactly how much water you need to heat up.
- Know your mug size? Enter the capacity of your mug (in milliliters) to find out exactly how many grams of coffee beans you need to grind.
Expert Brewing Tips
For the best results, always use a digital scale. While "tablespoons" and "cups" are common measurements, they vary wildly based on bean density and grind size. One gram of water is exactly equal to one milliliter, making the metric system the easiest way to brew accurately.
If your coffee tastes too bitter or strong, try a higher ratio (like 1:17). If it tastes sour, thin, or watery, try a lower ratio (like 1:15) to increase the concentration of coffee solids.