Calories in Mars Bars

Instrument — Food Profile
100g
Calories

471.00

kcal
Protein

8.82

g
Carbs

61.80

g
Fat

23.50

g
Fiber

2.90

g
Sugar

52.90

g

Curious about the nutritional profile of mars bars? Whether you are tracking your macros or just want to know how many calories they contain, you are in the right place. A standard 100g serving of mars bars provides 471.00 calories, 8.82g of protein, and 61.80g of carbs.

Serving Size Variations

Portion Size Calories Protein Carbs Fat
100g (Standard) 471.00 kcal 8.82g 61.80g 23.50g
1 oz (28g) 132 kcal 2.5g 17.3g 6.6g
2 BARS (34g) 160 kcal 3.0g 21.0g 8.0g

Vitamins & Minerals

Nutrient Amount
Vitamin A 53.00 mcg
Calcium 59.00 mg
Iron 1.06 mg
Sodium 235.00 mg
📊 Data Source: USDA FoodData Central Database (FDC ID: 2673395)
🩺 Reviewed by Ashwini Yadav Last Updated: July 2026

Nutrition FAQs

Is mars bars keto-friendly?

No, mars bars have 61.80g of carbs per 100g, which may disrupt ketosis.

How much protein does mars bars have?

They contain 8.82g of protein per 100g, which is moderate.

How many calories are in 1 2 bars of mars bars?

A single 2 bars (34g) of mars bars provides 160 calories.

How many calories are in mars bars?

100 grams of mars bars contains exactly 471.00 calories.