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How Many Calories in Formulated Bar, Mars Snackfood US, Snickers Marathon Honey Nut Oat Bar?

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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Quick reference — common serving sizes

A formulated bar, mars snackfood us, snickers marathon honey nut oat bar contains 378 calories per 100g. A typical 1 bar (55g) provides about 208 calories. Formulated Bar, Mars Snackfood US, Snickers Marathon Honey Nut Oat 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 Honey Nut Oat Bar Nutrition Facts

% 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.

• High in protein (45% DV) — an excellent source
• High in carbohydrates (20% DV) — an excellent source
• High in fibre (39% DV) — an excellent source
• A good source of fat (10% DV)
• High in iron (101% DV) — an excellent source
• High in vitamin C (196% DV) — an excellent source
• High in riboflavin (B2) (292% DV) — an excellent source

• High in saturated fat (22% DV) — worth weighing against your daily intake if you're watching this specifically

• Calories: 19% DV
• Protein: 45% DV
• Carbohydrates: 20% DV
• Fibre: 39% DV
• Fat: 10% DV
• Saturated fat: 22% DV
• Sodium: 14% DV
• Potassium: 0% DV
• Calcium: 0% DV
• Iron: 101% DV
• Vitamin C: 196% DV
• Vitamin A: 0% DV
• Selenium: 0% DV
• Riboflavin (B2): 292% DV

Have a cat or dog? Check whether formulated bar, mars snackfood us, snickers marathon honey nut oat 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 honey nut oat bar fit your diet?

High-protein diets

At 22.5g of protein per 100g, formulated bar, mars snackfood us, snickers marathon honey nut oat 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.

Fibre intake

Formulated Bar, Mars Snackfood US, Snickers Marathon Honey Nut Oat Bar provides 11.0g of fibre per 100g — a meaningful contribution toward the commonly cited 25-30g daily target, which supports digestion and helps with feeling fuller for longer.

Foods with a similar calorie count

Other snacks closest to formulated bar, mars snackfood us, snickers marathon honey nut oat bar by calories per 100g:

Last updated: 27 October 2026

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