Coffee-to-Water Ratio Calculator
Calculate the perfect amount of coffee grounds for your brew.
Use this many coffee grounds:
Understanding Coffee-to-Water Ratios
In the world of specialty coffee, the "ratio" is the most important variable you can control. It refers to the relationship between the weight of your dry coffee grounds and the weight of your brewing water. Precision is key to consistency; using a digital scale and this calculator ensures your morning cup tastes exactly how you want it every time.
Why Use a Coffee Calculator?
Most people measure coffee by "scoops" and water by "cups." However, coffee bean density varies wildly based on roast level and origin, and a standard kitchen "cup" isn't always 8 ounces. By calculating by weight (grams), you eliminate variables. A 1:16 ratio means for every 1 gram of coffee, you use 16 grams (or milliliters) of water.
Common Brewing Ratios
| Ratio | Best For… | Flavor Profile |
|---|---|---|
| 1:2 | Espresso | Intense, syrupy, concentrated |
| 1:12 | Moka Pot | Strong, bold, heavy body |
| 1:15 | Aeropress / Pour Over | Full-bodied, punchy flavors |
| 1:16 | Automatic Drip | Balanced, clarity and body |
| 1:17 | French Press / Chemex | Light, tea-like, clean finish |
Calculation Example
If you want to brew a standard 12oz mug (which is approximately 350ml of water) using a 1:16 ratio:
- Step 1: Identify your water weight (350g).
- Step 2: Divide the water weight by the ratio number (350 / 16).
- Step 3: Result = 21.8g of coffee.
How Water Weight Works
One of the beauties of the metric system in coffee brewing is that 1ml of water equals exactly 1 gram. This makes it incredibly simple to use a scale to measure your liquid volume as you pour. If this calculator tells you to use 500ml of water, you simply place your carafe on the scale and pour until it reads 500g.