Prime Rib vs Sirloin: Calories and Nutrition Compared (2026)

Sirloin is higher in protein at 30.8 g compared to prime rib's 22.5 g. Sirloin also has fewer calories at 177 versus prime rib's 378.

When comparing prime rib and sirloin, significant differences in calories and protein content emerge. This analysis provides a clear view of their nutritional profiles per 100 g.

What Is the Difference Between Prime Rib and Sirloin?

Prime rib is a cut of beef from the rib section, known for its rich flavor and tenderness. It is often served as a roast and is popular in fine dining. Sirloin is a cut of beef from the rear back portion of the animal, recognized for its balance of flavor and tenderness. It is commonly grilled or pan-seared.

Prime Rib vs Sirloin: Nutrition Side by Side

The following table outlines the nutritional differences between prime rib and sirloin per 100 g.

Nutrient (per 100 g)	Prime rib (beef rib roast)	Top sirloin steak (broiled)
Calories	378 kcal	177 kcal
Protein	22.5 g	30.8 g
Carbs	0 g	0 g
Sugar	0 g	0 g
Fat	31.3 g	5.0 g
Fiber	0 g	0 g
Sodium	63 mg	66 mg

Which Is Better, Prime Rib or Sirloin?

For weight loss: Sirloin has significantly fewer calories at 177, compared to prime rib's 378.

For muscle and protein: Sirloin provides more protein at 30.8 g, while prime rib offers 22.5 g.

For low-carb or low-sugar: Both prime rib and sirloin contain 0 g of carbs and 0 g of sugar.

How to Track Prime rib and Sirloin Accurately

It's easy to misjudge portion sizes and macronutrient content when evaluating different cuts of meat. Nutrola is an AI nutrition tracking app that identifies foods from a photo and returns calories and macros from a database of more than 1.8 million foods. It also supports barcode scanning and voice logging. Nutrola is available from EUR 2.50 per month and shows no ads on any tier.

How We Compiled These Numbers

The numbers provided are rounded reference values intended for educational use and should not be considered medical advice. Always consult a healthcare professional for dietary guidance. Values are per 100 g from USDA FoodData Central.

Frequently Asked Questions (FAQ)

Which has more protein, prime rib or sirloin?

Sirloin has more protein at 30.8 g, while prime rib has 22.5 g.

Which has fewer calories, prime rib or sirloin?

Sirloin has fewer calories at 177, compared to prime rib's 378.

What is the fat content in prime rib?

Prime rib contains 31.3 g of fat per 100 g.

What is the sodium content in sirloin?

Sirloin contains 66 mg of sodium per 100 g.

Do both cuts have carbs?

Both prime rib and sirloin have 0 g of carbs per 100 g.

How much sugar is in prime rib?

Prime rib contains 0 g of sugar per 100 g.

Key Takeaways

• Prime rib has 378 calories per 100 g.
• Sirloin has 177 calories per 100 g.
• Prime rib contains 22.5 g of protein.
• Sirloin contains 30.8 g of protein.
• Both cuts have 0 g of carbs and sugar.
• Prime rib has 31.3 g of fat, while sirloin has 5.0 g.