Coffee-Water Ratio Rechner — Formel

How to Calculate Coffee-to-Water Ratio

Standard Ratios

  • Drip / Pour-Over: 1:16 (60 g per liter)
  • French Press: 1:14 (70 g per liter)
  • AeroPress: 1:12 (versatile, can be diluted)
  • Espresso: 1:2 dose-to-yield (18 g in, 36 g out)

    • Formula

    Coffee (g) = Water (mL) x Ratio per Liter / 1000 x Strength Factor

    One standard "cup" of coffee is 6 oz (177 mL). The SCA (Specialty Coffee Association) golden ratio is 55-65 g per liter.

    Grind Size Matters

    The ratio assumes the correct grind for the method. Too fine = over-extraction (bitter). Too coarse = under-extraction (sour, thin).

    Lösungsbeispiel

    4 cups of drip coffee, standard strength.

    1. Water = 4 x 177 = 708 mL
    2. Coffee = 708 x 60 / 1000 = 42.5 g
    3. About 8.5 tablespoons of ground coffee
    4. Ratio = 1:16.7 water to coffee