How Much Sugar Is Usually In A Glass Of Red Wine? - Tasting Table
Briefly

The sugar content in wines varies widely depending on the type, with sweet wines like Port containing over 100 grams of sugar per liter. In contrast, dry red wines average only 1 to 4 grams per liter, significantly lower than soda. The term 'dry' lacks regulation in the U.S., leading consumers to often misinterpret sugar contents. Winemaker Allison Meschter emphasizes that fermentation techniques greatly affect the final sugar levels in wines, showcasing some surprising facts about common misconceptions surrounding wine sweetness.
Wines that belong in the sweet or dessert category will have much higher concentrations of sugar. For example, the sugar concentration in Port can exceed 100 grams per liter.
In the U.S., 'dry' will mean 1 to 4 grams per liter of residual sugars. A 1-liter bottle of Coca-Cola contains about 106 grams of sugar.
The term 'dry' is not regulated, but most winemakers consider dry wines to have minimal residual sugars, still significantly lower than typical soda.
During fermentation, yeast converts grape sugar into alcohol. By using temperature-controlled tanks, we can manage the fermentation rate, affecting sugar conversion.
Read at Tasting Table
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