Coffee Brew Ratio Calculator

1. Choose Beans, Water, or Cups mode.
2. Enter ratio, cups, and ml per cup.
3. Coffee beans, water, and per-cup amounts appear on the right.

• Useful when you want to brew two cups at 1:15; adjust inputs to compare outcomes.
• Useful when you want to find beans needed for 300 ml water; adjust inputs to compare outcomes.
• Prefer product labels, recipe notes, and equipment markings when available.
• When unsure, start with a smaller or shorter estimate and adjust from the actual result.

Water ml = beans g × ratio. Beans g = water ml ÷ ratio. In cups mode, water ml = cups × ml per cup.

• This tool does not estimate brewed yield, bloom water, or method-specific recommendations.
• Beans, grind, water temperature, and equipment change taste.
• Use results as a starting ratio and adjust to preference.