One bottle of wine requires about 600 to 800 grapes to make.

A standard 750ml bottle of wine contains the juice of roughly 2.5 to 3 pounds of fresh grapes. During the crushing process, about 70% to 80% of the grape weight becomes juice. This liquid is called must before it turns into wine.Red wine keeps the grape skins during fermentation to add color and texture. White wine makers remove the skins immediately. One grapevine usually grows about 40 clusters of grapes each year. This is enough to fill about 10 bottles of wine.The sugar in the grapes determines how much alcohol the wine will have. Yeast eats this sugar and turns it into ethanol and carbon dioxide gas. Some liquid also evaporates while the wine sits in wooden barrels. This loss is about 2% to 5% of the volume every year.The final wine has more calories than the original grapes because the sugars and nutrients are concentrated. This process makes the flavors much stronger than plain grape juice.