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How Many Calories in Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar?

✓ Nutrition data reviewed against USDA FoodData Central and Public Health England guidance by Jordan Morley, Editorial Reviewer. Last reviewed: 27 October 2026.

Fact-checked against original USDA source data by Jordan Morley, Editorial Reviewer. Not a registered dietitian — nutrition figures are sourced directly from USDA FoodData Central, not independently assessed medical advice.

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396
calories per 100g
218 calories per 1 bar (55g)
MORiSH high-protein snacks — try alongside
24.3gProtein
47.2gCarbs
13.1gFat
2.5gFibre

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⚖ Kitchen Scales

Quick reference — common serving sizes

AmountCaloriesProtein
1 oz (28g)112 kcal6.9g
100g396 kcal24.3g
1 bar218 kcal13.4g
grams
396kcal
24.3gprotein
47.2gcarbs
13.1gfat
2.5gfibre

A formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar contains 396 calories per 100g. A typical 1 bar (55g) provides about 218 calories. Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar is high in calories and is a good source of protein. Accurate tracking starts with weighing portions — a digital kitchen scale removes all the guesswork.

Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar Nutrition Facts

NutrientPer 100gPer serving (55g)
Calories396 kcal218 kcal
Protein24.3g13.4g
Carbohydrates47.2g26.0g
of which Sugars32.9g18.1g
Fat13.1g7.2g
of which Saturates4.7g2.6g
Fibre2.5g1.4g
Sodium462.0mg254mg
Potassium0.0mg0mg
Calcium965.0mg531mg
Iron0.0mg0.0mg
Vitamin C144.4mg79.4mg
Vitamin A0.0µg0µg
Selenium0µg0µg
Riboflavin (B2)3.1mg1.7mg

% of Daily Value (per 100g)

Based on a standard 2,000-calorie reference diet — the same basis used on nutrition labels in the US and UK.

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Have a cat or dog? Check whether formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar is safe for your dog or safe for your cat before sharing. Also check the full ingredient breakdown and food safety guide for pregnancy and storage advice. If calorie tracking is part of a broader health check, hormone testing can rule out metabolic factors affecting your results. Tracking supplements too? Check drug and supplement interactions before combining anything new.

Good to know

Check the actual serving size on packaging before comparing to the per-100g figures here — snack portions are often smaller (or larger) than 100g.

Does formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar fit your diet?

High-protein diets

At 24.3g of protein per 100g, formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar clears the 15g/100g threshold generally used to call a food high-protein — a useful contributor if you're tracking protein intake for muscle maintenance, satiety, or a higher-protein eating pattern.

Frequently Asked Questions

How many calories in formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar per 100g?

Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar contains 396 calories per 100g, based on USDA reference data.

Is formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar high in calories?

A 1 bar of formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar (55g) has around 218 calories — roughly 11% of a 2,000-calorie daily intake.

Is formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar good for weight loss?

Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar is fairly calorie-dense at 396 calories per 100g, so portion size matters when losing weight. A 1 bar provides about 218 calories.

How much protein is in formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar?

Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar contains 24.3g of protein per 100g.

Is formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar a good source of fibre?

Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar is relatively low in fibre at 2.5g per 100g, so pairing it with fibre-rich sides (vegetables, whole grains, legumes) can help balance a meal.

How does formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar compare to cereals ready-to-eat, malt-o-meal, berry colossal crunch?

Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar has 396 calories per 100g, close to cereals ready-to-eat, malt-o-meal, berry colossal crunch at 396 — 0 calories fewer per 100g. See the full macro breakdown above.

How many servings of formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar for 20g of protein?

With 24.3g of protein per 100g, you'd need roughly 82g of formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar to reach 20g of protein

Foods with a similar calorie count

Other snacks closest to formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar by calories per 100g:

FoodCaloriesProteinCarbsFat
Formulated Bar, Mars Snackfood US, Snickers Marathon Chewy Chocolate Peanut Bar (this page)396 kcal24.3g47.2g13.1g
Cereals Ready-to-eat, Malt-O-Meal, Berry Colossal Crunch396 kcal4.2g86.5g4.2g
Cereals Ready-to-eat, Malt-O-Meal, Oat Blenders with Honey396 kcal6.8g84.9g4.2g
Muffins, Wheat Bran, Dry Mix396 kcal7.1g73.0g12.0g
Kashi, H2H Woven Wheat Cracker, Original396 kcal10.6g73.4g11.6g
Candies, Gumdrops, Starch Jelly Pieces396 kcal0.0g98.9g0.0g
Cereals Ready-to-eat, Quaker, Cap'N Crunch with Crunchberries397 kcal4.5g85.9g4.8g

More kit for formulated bar, mars snackfood us, snickers marathon chewy chocolate peanut bar tracking

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Last updated:

Nutrition data: USDA FoodData Central (public domain, CC0 1.0). Values are per 100g unless stated.