Fortification Winemaking Calculator

  • Fortification

    Fortification is process that involves addition of grape spirits to still wine to increase the total percent of alcohol level. This procedure is important part of making a sweet and fortified wines like Port, Madeira and Marsala, where the grape spirits is added into the wine before fermentation is finished, leaving a high percentage of residual sugar. The timing and volume of the grape spirit is critical to achieve the final desired alcoholic strength and sugar concentration. Fortification can be used also to find the perfect tasting spot after dealcoholization of the wine.

    Volume of wine
    Alcohol level of spirits %v/v
    Alcohol level of wine %v/v
    Target alcohol level after fortification %v/v
    Volume of Spirits to be add
  • Weight and Volume equivalents

    Weight equivalents

    1 g = 1000 mg
    1 mg = 0.001 g
    1 µg = 0.001 mg
    1 oz = 28.35 g
    1 kg = 2.2 lbs = 1000 g
    1 lb = 16 oz = 454 g = 0.454 kg
    1 (US)ton = 2000 lbs = 907.19 kg
    1 metric ton = 2204.62 lbs = 1000 kg

    Volume equivalents

    1 L = 1000 mL
    1 dL = 10 L
    1 mL = 1000 µL
    1 hL = 100 L = 26.4 gal
    1 L = 33.8 oz = 1000 mL
    1 (US)gal = 128 oz = 3785 mL = 3.78 L
    1 qt = 32 oz = 946 mL = 0.946 L
    1 pt = 16 oz = 473 mL = 0.473 L

    Weight / Volume equivalents

    1.0 g/L = 1000 mg/L = 1000 ppm
    1.0 g/L = 0.1 g/100 mL = 100 mg/100 mL
    1.0 g/L = 1.00 mg/mL = 1000 µg/mL
    1.0 g/L = 0.1%(w/v)
    1.0 mg/L = 1ppm
    1 lb/1000 gal = 454 g/1000 gal = 0.45 g/gal.
    1 lb/1000 gal = 0.12 g/L = 12 g/hL = 120 ppm
    1 g/hL = 1 g/26.42 gal. = 0.038 g/gal.

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