Calories in Root Beer: Nutrition Facts & Serving Sizes
Per 1 can or bottle (16 fl oz) (493g)
Per 100g
Source: USDA FoodData Central, SR Legacy, March 2026.
A 12 fl oz can of root beer contains about 152 calories, coming entirely from 39.2g of sugar with zero protein, zero fat, and zero fiber. Root beer is a carbonated soft drink sweetened with high-fructose corn syrup or sugar, delivering a quick hit of simple carbs. Per 100g it clocks in at 41 calories and 10.6g of carbs, all of which is sugar. There are no meaningful micronutrients to speak of, just trace amounts of calcium (5mg) and sodium (13mg per 100g). For anyone tracking macros, root beer is basically liquid sugar with no satiety value. It spikes blood sugar fast and provides zero nutritional benefit beyond calories. Diet or zero-sugar versions cut the calories dramatically, making regular root beer a drink to limit if body composition is the goal.
Nutrition Highlights
Calories by Serving Size
| Serving | Cal | Protein | Carbs | Fat | Fiber |
|---|---|---|---|---|---|
| 1 can or bottle (16 fl oz) (493g) | 202.1 | 0g | 52.3g | 0g | 0g |
| 1 can or bottle (12 fl oz) (370g) | 151.7 | 0g | 39.2g | 0g | 0g |
| 1 fl oz (31g) | 12.6 | 0g | 3.3g | 0g | 0g |
| 100g | 41 | 0g | 10.6g | 0g | 0g |
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Full Nutrition Facts (per 100g)
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Calories | 41 | 2% |
| Protein | 0g | |
| Total Fat | 0g | |
| Total Carbohydrates | 10.6g | 4% |
| Dietary Fiber | 0g | |
| Sugars | 10.6g | 21% |
| Sodium | 13mg | 1% |
Vitamins & Minerals (per 100g)
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Calcium | 5mg | 0% |
| Iron | 0.1mg | 1% |
| Potassium | 1mg | 0% |
| Magnesium | 1mg | 0% |
| Zinc | 0.1mg | 1% |
| Selenium | 0.1mcg | 0% |
% Daily Values based on a 2,000 calorie diet (FDA reference).
Health Benefits of Root Beer
Root beer offers essentially no nutritional benefits. It is a sugar-sweetened carbonated beverage with calories coming entirely from simple sugars.
For people who drink it occasionally as a treat, the enjoyment factor is real. The carbonation can provide a temporary feeling of fullness. Some root beers are naturally caffeine-free, which makes them a lower-stimulant option compared to cola-based sodas.
That said, regular consumption of sugar-sweetened beverages like root beer is associated with increased caloric intake without improving satiety. Liquid calories do not register the same way as solid food calories in terms of hunger signals.
For fitness-focused individuals, the main consideration is that a single can adds 152 calories of pure sugar to your daily total. If you are in a caloric deficit for fat loss, those calories could instead come from protein or whole foods that support muscle retention and keep you fuller longer.
If you enjoy root beer, zero-sugar versions offer the same flavor profile with a fraction of the calories, making it easier to stay on track without giving up the drink entirely.
Dietary Considerations
Root beer is vegan and gluten-free in most formulations. It contains no protein, fat, or fiber. The calorie content comes entirely from sugar (10.6g per 100g). It is not suitable for ketogenic diets due to its high sugar content. Not recommended for weight loss goals due to the high sugar load and lack of satiety. People managing blood sugar should be aware of the rapid glucose spike a full can can produce. Diet root beer eliminates the sugar and calories, making it a workable substitute for those cutting carbs. Always check the label on specific brands for additives or allergens.
Daily Intake (100g)
100g of root beer provides 2% of a 2,000-calorie diet.
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Frequently Asked Questions
How many calories in root beer?
A standard 12 fl oz can of root beer contains about 152 calories. A larger 16 fl oz bottle has around 202 calories. Per 100g, root beer is 41 calories.
Is root beer good for weight loss?
Root beer is not ideal for weight loss. A 12 fl oz can packs 39.2g of sugar and 152 calories with no protein, fiber, or fat to slow digestion. Those liquid sugar calories add up fast without making you feel full. Zero-sugar root beer is a much better option if you are cutting calories.
How much protein in root beer?
Root beer contains 0g of protein. It provides no macronutrient value beyond carbohydrates from sugar.
How much sugar is in a can of root beer?
A 12 fl oz can of root beer contains 39.2g of sugar. A 16 fl oz bottle contains 52.3g of sugar. All carbohydrates in root beer come from sugar.
Is root beer gluten-free?
Most commercially produced root beers are gluten-free, but formulations vary by brand. Check the label on your specific brand to confirm, especially if you have celiac disease or a gluten sensitivity.
How does root beer compare to regular soda?
Root beer is similar in calorie and sugar content to most regular colas. A 12 fl oz can has about 152 calories and 39.2g of sugar, which is comparable to other mainstream sodas. Neither provides meaningful nutritional value.
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