Roast beef vs Prime rib: Which Has More Calories?
Per 100 g, Roast beef has 170 kcal and Prime rib has 355 kcal, so Roast beef has 52% fewer calories.
Roast beef has more protein (29.1 g vs 16.2 g). Prime rib has more fat (31.7 g vs 5.92 g). Relative to calories, Roast beef is the better protein source (17.1 g vs 4.55 g of protein per 100 kcal).


Nutrition Facts
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Amount Per Serving:
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Amount Per Serving:
Roast Beef vs Prime Rib 100g Compare
| per 100g | Roast beef | Prime rib |
|---|---|---|
| Calories | 170 | 355 |
| Fat | 5.92 g | 31.66 g |
| Protein | 29.12 g | 16.15 g |
| Water | 63.93 g | 51.51 g |
| Calcium | 5 mg | 9 mg |
| Iron | 2.75 mg | 1.7 mg |
| Magnessium | 27 mg | 16 mg |
| Potassium | 377 mg | 263 mg |
| Sodium | 57 mg | 53 mg |
| Vitaminium B1 (Thiamine) | 0.068 mg | 0.08 mg |
| Vitaminium B2 (riboflavin) | 0.194 mg | 0.13 mg |
| Vitaminium B3 (Niacin) | 5.882 mg | 2.75 mg |
| Vitaminium B6 | 0.584 mg | 0.31 mg |
| Vitaminium B9 (Folic acid) | 0.007 µg | 0.005 µg |
Less Calories in Roast beef
At first glance, you can see that in roast beef is much less calories than in Prime rib.
Roast beef has 170 kcal per 100g and Prime rib 355 kcal per 100g so it is pretty easy to calculate that the difference is about 109%.
Additionally, it is also easy to notice that most of the calories in roast beef comes from protein and in Prime rib from fat.
See tables below to compare roast beef with Prime rib in details.
Roast beef 100g
170kcalCalories source
- 0% CARBS.
- 69% PROTEIN
- 31% FAT
Prime rib 100g
355kcalCalories source
- 0% CARBS
- 18% PROTEIN
- 82% FAT
Compares of roast beef
Compares of Prime rib
About the data
Nutrition values on this page are given per 100 g of the food and are based on the official United States Department of Agriculture FoodData Central database. The exact record used for each food is linked under the tables.
Marcin Piotrowicz – calories-info.com creator · Healthy diet and healthy lifestyle promoter. The information is for general purposes and is not medical or dietary advice.