Conversion of volumes (gal to L):
Tank Volumes” in white box, above “Gallons (gal)” and add “Enter the number of gallons to convert to liters and click on the Apply to Calculator to add this conversion to the Tank Volume field.
Enter your wine parameters below to calculate the SO2 addition for your wine:
All units must be converted to the metric system.
Amount of free SO2 [mg/L] required to reach 0.8 mg/L molecular SO2 depending on pH.
You have a barrel (60 gal) of wine, apH of 3.61, and have determined the free SO2 to be 12 ppm. Your target level at this pH is 51 mg/L to reach microbial stability. With a 10% sulfur dioxide solution (preparation see below), you will need to add 88.5 mL of that solution to your barrel.
Potassium Metabisulfite (KMBS) contains 57% sulfur dioxide. A 10% sulfur dioxide solution contains 100 g/L SO2.
To get 100 g/L sulfur dioxide, dissolve 175 g/L KMBS in water.
