A typical steak delivers roughly 25 to 26 grams of protein per 3-ounce cooked serving, though the exact amount depends on the cut and how much fat it carries. A larger restaurant-sized steak (8 to 12 ounces) can pack 50 to 80 grams of protein in a single sitting.
Protein by Cut
Not all steaks are created equal when it comes to protein. Leaner cuts pack more protein per ounce because fat displaces protein in the meat. Here’s how popular cuts compare, based on USDA data:
- Top sirloin (3 oz cooked, lean only): 25.8 g protein
- Ribeye petite roast/filet (4 oz raw, lean only): 25.9 g protein
- Tenderloin (3 oz cooked, lean and fat): 22.5 g protein
- Ribeye cap steak (4 oz raw, lean only): 22.0 g protein
The pattern is straightforward: leaner cuts like sirloin top the list, while fattier cuts like ribeye cap steak fall a few grams behind. That said, the differences are modest. You’re getting at least 22 grams of protein from any standard steak serving.
Keep in mind that raw and cooked weights aren’t interchangeable. Steak loses about 25% of its weight during cooking as moisture evaporates. A 4-ounce raw steak shrinks to roughly 3 ounces cooked. When you see protein listed for a raw cut, the cooked version will be more protein-dense per ounce simply because the water is gone.
How Steak Compares to Chicken
Chicken breast is often considered the gold standard for lean protein, and the numbers back that up. A 4-ounce chicken breast provides about 37 grams of protein with only 4 grams of fat. A 3-ounce serving of lean beef delivers around 24 grams of protein with 10 grams of fat. Ounce for ounce, chicken breast has a clear edge in protein density.
That doesn’t make steak a poor protein source. It just means you get more calories alongside your protein when choosing beef. If you’re tracking macros closely, chicken is more efficient. If you’re eating for overall nutrition, steak brings things to the table that chicken doesn’t, including significantly more iron, zinc, and vitamin B12.
Scaling Up to Real Portions
Most people don’t eat a 3-ounce steak. Restaurant steaks typically range from 8 to 16 ounces, and even a home-grilled steak is often 6 to 10 ounces. Here’s what that means for protein:
- 6 oz cooked sirloin: ~50 g protein
- 8 oz cooked sirloin: ~68 g protein
- 12 oz cooked ribeye: ~88 g protein
A single 8-ounce steak can cover roughly half the daily protein target for most adults. The 2025 Dietary Guidelines for Americans now recommend 1.2 to 1.6 grams of protein per kilogram of body weight per day, which is 50 to 100 percent higher than the old minimum recommendation. For a 170-pound person, that works out to about 93 to 123 grams daily. One decent steak gets you a long way there.
Why Steak Protein Is Highly Absorbable
Protein quality matters as much as quantity. The international standard for measuring protein quality is the DIAAS score, which rates how well your body can actually digest and use the amino acids in a food. Any score above 100 is considered excellent. Beef ribeye scores between 107 and 130 for adults depending on cooking temperature, putting it among the highest-quality protein sources available.
Steak is also rich in leucine, the amino acid that plays the biggest role in triggering muscle repair and growth. A 100-gram portion of cooked ribeye contains about 1.7 to 2.2 grams of leucine. Research on muscle protein synthesis generally points to 2 to 3 grams of leucine per meal as the threshold for maximizing that response, so a standard steak serving gets you close to or above that mark.
What Else You Get With the Protein
Steak isn’t just a protein delivery system. A 3-ounce serving of broiled top sirloin also provides 4.7 mg of zinc (about 43% of the daily value for men), 1.7 mg of iron, and 1.4 mcg of vitamin B12 (over half the daily value). The iron in red meat is heme iron, which your body absorbs two to three times more efficiently than the plant-based form found in spinach or beans.
Zinc and B12 are nutrients that many people fall short on, particularly older adults and those who limit animal products. A single steak serving makes a meaningful dent in both. This nutrient package is one reason dietary guidelines continue to include lean red meat as part of a balanced diet, even as they recommend moderating intake of processed meats and higher-fat cuts.
Getting the Most Protein From Your Steak
If your goal is maximizing protein per calorie, choose leaner cuts: top sirloin, eye of round, or flank steak. Trim visible fat before cooking. Grilling, broiling, or pan-searing without added oil keeps calories lower than methods like pan-frying in butter.
Cooking temperature also plays a role in protein quality. Beef cooked to medium (around 145°F internal) retains slightly better amino acid digestibility than well-done steaks cooked to higher temperatures. The differences aren’t dramatic, but if you already prefer your steak medium, that’s a small bonus working in your favor.