Standard-drink calculator
Glass of port: standard drinks & calories
1
standard drinks
113
calories (est.)
20%
ABV
A 3 oz glass of Glass of port at 20% ABV contains about 0.6 fl oz of pure alcohol. Since one US standard drink is 0.6 fl oz of alcohol, that works out to about 1 standard drinks.
The math
standard drinks = volume × ABV% ÷ 0.6
3 oz × 20% ÷ 0.6 = 1
One US standard drink is 0.6 fl oz of pure alcohol. See what counts as a standard drink or the standard drink calculator to check any pour.
Frequently asked questions
How many standard drinks are in a Glass of port?
A 3 oz glass of Glass of port at 20% ABV is about 1 US standard drinks. That's 0.6 fl oz of pure alcohol divided by 0.6 fl oz per standard drink.
How many calories are in a Glass of port?
Roughly 113 calories for a 3 oz glass, estimated from its alcohol content plus typical carbohydrates for the style. This is a directional estimate, not a label-exact figure.