Most popular protein bar brands in the United States
Ranked by popularity in the BodyPal database
# Productkcal / 100 g
1PowerBar Clean Whey Protein Bar1 bar · 60 g317 kcal
2RXBAR Protein Bar1 bar · 33 g394 kcal
3RXBAR Kids Protein Bar1 bar · 33 g424 kcal
4RXBAR Protein Bar, Blueberry1 bar · 52 g385 kcal
5RXBAR Protein Bar, Berry Blast1 bar · 33 g394 kcal
6RXBAR Protein Bar, Peanut Butter1 bar · 52 g385 kcal
7RXBAR Protein Bar, Coconut Cacao1 bar · 52 g404 kcal
8RXBAR Protein Bar, Mango Pineapple1 bar · 52 g404 kcal
Bar sizes and recipes vary a lot, so brand labels here run from 317 to 424 calories per 100 g around the 412 used above.
Source: manufacturer labels / USDA FoodData Central.
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Protein bar FAQs
How many calories are in one protein bar?
A standard 53 g protein bar is about 218 calories. A larger 80 g bar is closer to 332 calories.
Are protein bars good for weight loss?
One 53 g bar is 218 calories with 16.1 g protein, 20.4 g carbs and 8 g sugar. It is denser than fruit but lighter than a candy bar, which runs about 491 calories per 100 g.
Protein bar vs Snickers bar: which has fewer calories?
Per 100 g a protein bar is 412 calories and a Snickers bar 491. A 53 g protein bar works out at 218 calories.
How much protein is in a protein bar?
About 16.1 g in a 53 g bar, from 30.3 g per 100 g. Branded bars range from 21.2 g to 33.3 g of protein per 100 g.