Calories in 3 Oz of Root Beer
3 oz of root beer (85 g) has 35 calories. That is 2% of a 2,000 calorie diet.
The calories come from 0 g of protein, 0 g of fat and 9 g of carbohydrates, a split of 0% protein, 0% fat and 100% carbs. For comparison, 2 oz of root beer has 23 and 4 oz of root beer has 46 calories. Burning 35 calories takes about 6 minutes of brisk walking or 3 minutes of running for a 155 lb adult, based on Harvard Health Publishing activity estimates.
Root Beer Calorie Calculator
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Root Beer calories by serving size
Common amounts of root beer with calories and macros. Tap a row for its full nutrition page.
Root Beer vs similar foods
Calories per 100 g compared with other drinks.
Root Beer: common questions
How many calories are in 3 oz of root beer?
3 oz of root beer weighs about 85 g and has 35 calories.
How much protein is in 3 oz of root beer?
3 oz of root beer has 0 g of protein, which is 0% of the 50 g Daily Value.
How many carbs are in 3 oz of root beer?
3 oz of root beer has 9 g of carbohydrates, including 0 g of fiber and 9 g of sugars.
How much root beer is 100 calories?
100 calories of root beer is 244 g, about 8 fl oz of root beer.
More about root beer
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Weights and conversions
Source: USDA FoodData Central, SR Legacy. FDC ID 171871. Original description: Beverages, carbonated, root beer. Portion weights are USDA household measures.