The number of pounds of grapes are needed to make a gallon of wine?

After doing some research study, I discovered that it takes about 2.6 pounds of grapes to make a single bottle of red wine, which equals out to about 8.5 pounds per gallon.  you can try this out This number can fluctuate depending on the size of the grapes and the preferred level of sweetness/tannins in the red wine. my review here