Poultry & Red Meat / Red Meat

Beef Sirloin Steak (lean): Protein, Calories & Full Nutrition Breakdown

One of the few whole foods that pairs high protein density with meaningful heme iron and zinc, both of which are harder to hit on plant-only diets.

29.0gProtein / 100g
49.3gPer 6oz steak (170g)
15.85gProtein per 100 cal
0.92Quality score

Beef Sirloin Steak (lean)

6oz steak (170g)
Protein per 100g29.0g
Calories per 100g183
Fat per 100g6.9g
Carbs per 100g0.0g
Fiber per 100g0.0g
Leucine (per serving, est.)2350mg
Typical cost$$$
Quality 0.92 high-DIAAS complete animal protein
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Why Beef Sirloin Steak (lean) shows up in protein-forward diets

One of the few whole foods that pairs high protein density with meaningful heme iron and zinc, both of which are harder to hit on plant-only diets.

Serving-size math

A 6oz steak (170g) portion delivers 49.3g of protein and roughly 311 calories. Scaled per 100 calories, that works out to 15.85g of protein — useful for comparing against other foods on a calorie-matched basis rather than a weight-matched one.

Prep tip

Rest 5+ minutes off heat — sirloin's lower fat content means it loses moisture fast if sliced immediately.

Best for

  • bulking
  • iron/zinc intake

Frequently asked

How much protein is in beef sirloin steak (lean)?

29.0g per 100g, or 49.3g per 6oz steak (170g).

Is beef sirloin steak (lean) a complete protein?

Yes — it's rated a complete, high-quality protein source (high-DIAAS complete animal protein).