Tequila, like all distilled spirits, is derived from the fermentation and distillation of natural ingredients, specifically the blue agave plant. Understanding the caloric content of the base spirit is the first step in assessing the overall impact of tequila consumption on a diet. This analysis provides a clear answer to the calorie question, examining the science behind alcohol calories and the often-overlooked caloric additions from mixers.
The Calorie Count of a Standard Shot
The caloric content of pure tequila is determined entirely by its alcohol concentration, as it contains virtually no other macronutrients. Alcohol (ethanol) is a highly energy-dense substance, containing approximately seven calories per gram. Because tequila is a distilled spirit, a standard shot contains zero carbohydrates, fat, or protein.
A widely accepted measure for a “standard shot” in the United States is 1.5 fluid ounces (fl. oz.). For a typical 80-proof tequila (40% alcohol by volume, or ABV), this 1.5 fl. oz. serving translates to approximately 96 to 97 calories. These calories are often referred to as “empty calories” because they provide energy without offering meaningful vitamins or minerals.
Factors Influencing Caloric Content
While 97 calories represents the average for a standard shot, the final number varies based on two primary factors: the spirit’s proof and the actual serving size. Proof is a measure of alcohol concentration; a higher proof contains a greater amount of ethanol per unit of volume. For example, a 1.5 oz serving of 100-proof tequila (50% ABV) would contain roughly 123 calories, a significant increase over the 80-proof standard.
The volume of the pour also heavily influences the final count, as many bars or home pours do not strictly adhere to the 1.5 oz standard. A smaller, 1-ounce pour of 80-proof tequila reduces the content to about 64 calories. Conversely, a generous 2-ounce pour, sometimes served as a double, increases the total calories to approximately 128.
Comparison to Other Common Spirits
Tequila’s caloric profile is almost identical to other unflavored, 80-proof spirits such as vodka, gin, rum, and whiskey. A 1.5 oz shot of any of these distilled liquors contains the same 96 to 97 calories. This parity exists because the calories in all these spirits are derived exclusively from the ethanol content, which is standardized at 40% ABV for 80-proof options.
The type of base ingredient—whether it is agave, potatoes, or grains—does not change the calorie count once the distillation process is complete. Any slight variations are negligible. When choosing a base spirit, the proof level is a far greater determinant of calories than the specific spirit chosen.
The Calorie Cost of Tequila Mixers
The vast majority of calories consumed in tequila-based drinks come from the accompanying mixers and sweeteners, not the spirit itself. When tequila is used in cocktails like a traditional margarita, the drink’s caloric load can easily surpass 200 to 300 calories per serving. This spike is due to the high sugar content found in pre-made mixes, fruit juices, and liqueurs.
Sweet orange liqueurs, such as Triple Sec, are a frequent addition to margaritas and can contribute 75 to 100 calories per ounce. A combination of 4 fl. oz. of commercial margarita mix and 1 fl. oz. of Triple Sec can add around 145 calories and 25 grams of sugar to the drink before the tequila is even factored in. Restaurant-sized or frozen margaritas can sometimes climb to over 400 calories due to large serving sizes and concentrated sugary ingredients.
To reduce the caloric impact, opt for low-calorie alternatives. Preparing a “skinny” version using fresh lime juice, a small amount of agave nectar or a calorie-free sweetener, and soda water can keep the total calorie count in the 100 to 150 range. A simple “ranch water,” made with tequila, fresh lime, and sparkling water, is one of the lowest-calorie options, as it eliminates all added sugar.