Beers have other calories besides alcohol. Different beers are brewed with different strengths of sugars for different lengths of fermentation times, vastly aff

Beers have other calories besides alcohol. Different beers are brewed with different strengths of sugars for different lengths of fermentation times, vastly affecting the residual sugars and finished alcohol amount. While fermenting the same wort for different lengths wouldn't necessarily change the total caloric content, not all beers start with the same amount of sugar.