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How many calories are in a serving of diet root beer soda?

Quick answer

Diet root beer has 0 calories, 0 g sugar and 0 mg caffeine. USDA FoodData Central lists "Soft drink, root beer, diet" at 0 kcal per 100 g, which is 0 kcal in a 12 fl oz can (360 g). Regular root beer has 41 kcal per 100 g, about 152 kcal per 12 fl oz can (our calculation).

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In this article
  1. How much sugar does root beer have?
  2. Does diet root beer have sodium?
  3. Do brands differ?

How much sugar does root beer have?

USDA FoodData Central lists regular root beer (FNDDS entry “Soft drink, root beer”) at 10.6 g total sugars per 100 g. A 12 fl oz can is 372 g in that entry, so a can holds about 39 g of sugar (our calculation). The diet entry lists 0 g sugars.

Per 12 fl oz can Regular root beer (372 g) Diet root beer (360 g)
Calories about 152 kcal (our calculation) 0 kcal
Total sugars about 39 g (our calculation) 0 g
Sodium about 48 mg (our calculation) about 22 mg (our calculation)
Caffeine 0 mg 0 mg

The USDA values per 100 g are: regular 41 kcal, 10.6 g sugars, 13 mg sodium; diet 0 kcal, 0 g sugars, 6 mg sodium. Both list 0 mg caffeine.

Does diet root beer have sodium?

Yes, a small amount. The USDA diet entry lists 6 mg sodium per 100 g, roughly 22 mg in a 12 fl oz can (our calculation). The regular entry lists 13 mg per 100 g.

Do brands differ?

These are generic USDA entries, not a specific brand. Brands can differ, so check the Nutrition Facts label on your can, especially for caffeine and ingredients such as phosphoric acid. We did not find an official source for any individual brand’s recipe, so we do not make brand claims here.

People also ask

Does diet root beer have calories?

USDA FoodData Central lists diet root beer at 0 kcal per 100 g, so a 12 fl oz can is 0 kcal. Check your brand's label.

How many calories does root beer have?

USDA lists regular root beer at 41 kcal per 100 g, about 152 kcal in a 12 fl oz can (our calculation).

How much sugar is in root beer?

USDA lists 10.6 g total sugars per 100 g, about 39 g in a 12 fl oz can (our calculation).

General information only, not medical advice. If you have a health condition or are pregnant, ask your doctor before changing what you drink.

Sources

  1. USDA FoodData Central: Soft drink, root beer, diet (FDC 2710558) and Soft drink, root beer (FDC 2710557), read 5 Nov 2026
Written by Drinks Type Editorial Team · Published Nov 23, 2024 · Updated Nov 5, 2026
About · How we verify this · Editorial policy · Corrections

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