How many calories and grams of protein are in an 8 oz top sirloin steak?

An 8 oz (227g) raw trimmed top sirloin steak delivers approximately 360 to 390 calories, packed with a massive 52g to 54g of high-quality protein and only 12g to 14g of total fat, making it an extraordinary high-P:E muscle-building cut.

Why is top sirloin one of the best cuts for bodybuilding and fat loss?

Top sirloin boasts a Protein-to-Energy (P:E) ratio exceeding 3.5, meaning over 65%–75% of its total calories derive directly from pure essential amino acids. This triggers maximum muscle protein synthesis while maintaining a strict caloric deficit.

What is the difference between top sirloin, sirloin tip, and picanha (coulotte)?

Top sirloin comes from the Gluteus medius (lean and tender). Sirloin tip comes from the round primal (Quadriceps femoris, leaner and firmer). Picanha (coulotte) is the top sirloin cap (Biceps femoris) left with a thick fat layer, delivering higher juiciness and fat calories.

Why does top sirloin get tough when cooked past medium-rare?

Because sirloin is naturally very lean, it lacks dense intramuscular marbling to insulate muscle fibers. Cooking past 135°F (57°C) causes rapid actomyosin tight-packing and water expulsion. For optimal tenderness, sear hot and rest 5–7 minutes.

How much natural creatine and bioavailable iron is found in sirloin?

Top sirloin contains approximately 4.5g to 5.0g of natural creatine per kilogram of fresh meat, along with 2.5mg of highly bioavailable heme iron per 8 oz portion, supporting cellular ATP recycling and oxygen transport during resistance training.

How do I calculate calories if I trim off the exterior sirloin fat cap?

Trimming the outer fat strip reduces total fat by roughly 6g to 10g per steak, decreasing total caloric content by 54 to 90 kcal while increasing the relative protein concentration to over 85% of total meal energy.

Top Sirloin Steak Calorie & High-Protein Macro Calculator

Calculate calories, protein-to-energy (P:E) ratios, and micronutrient density for Top Sirloin, Sirloin Tip, and Coulotte (Picanha) steaks across all cooking doneness levels.

Pro Tip for Top Sirloin Steak Calorie & High-Protein Macro Calculator: Always measure with an instant-read thermometer probe and rest pasture-raised meats on an elevated wire rack for optimal juiciness and flavor retention.

Variables & Parameters

Sirloin Steak Weight (oz) 10 oz

Measurement State

Raising & Marbling Profile

Cooking Fat Added to Pan

Calculated Targets

Primary Target

Optimal Target

Total Calories

Protein G

Fat G

Protein Density Pct

Creatine Est G

Protein Cut (6 oz Cooked)	Calories	Protein (g)	Creatine (g)	Heme Iron (mg)
pasture-raised Top Sirloin Steak	320 kcal	52.0 g	1.8 g	3.8 mg
Pasture-Raised Chicken Breast	280 kcal	53.0 g	0.6 g	1.1 mg
Wild Sockeye Salmon	360 kcal	46.0 g	0.8 g	0.9 mg
pasture-raised Filet Mignon	340 kcal	48.0 g	1.4 g	3.2 mg

Build Your Custom Meat Box

Pasture-raised American Wagyu and heritage beef delivered ranch-direct to your door with zero antibiotics or added hormones.

Build Your Custom Box →