WASHINGTON (July 3, 2014) The National Institutes of Health has created an online calculator you can use to figure out how much alcohol you're really consuming with those summer cocktails.
A "standard drink" is the amount of alcohol in a 12-ounce beer, 5 ounces of wine or an ounce and a half of distilled spirits and it’s a useful way to track consumption, but the multiple ingredients make for a harder count.
Recipes matter, too.
The calculator, for example, says a pina colada with 3 ounces of rum is the equivalent of two glasses of wine.
Cut some of the rum, though, and it's closer to a standard drink.
A margarita with an ounce and a half of tequila and an ounce of orange liqueur is the equivalent of 1.7 standard drinks.