How Many Grams Protein In Steak? | Cuts, Sizes, Clear Math

Steak sounds simple until you try to pin down one number. A strip steak, a flank steak, and a tenderloin don’t weigh the same, don’t lose the same water in the pan, and don’t carry the same fat trim. That’s why protein counts bounce.

This article gives you two things: (1) protein numbers for common steak cuts (measured as cooked portions), and (2) a way to estimate protein for any steak sitting on your plate, even if you didn’t weigh it raw.

What Changes The Protein In A Steak Serving

Protein in beef muscle tissue stays steady. What changes is the concentration you see per bite. Three practical factors drive that shift.

Cooked Weight Versus Raw Weight

Steaks lose water and some fat during cooking. The steak on your plate can weigh much less than the steak you started with. When weight drops, grams of protein per 100 g often rise, yet the total protein in that one steak doesn’t suddenly jump.

Lean Only Versus Lean And Fat

Nutrition tables often list “lean only” and “lean and fat” versions. Fat doesn’t add protein, so a fattier bite can show a lower protein number per ounce than a lean bite of the same cut.

Cut, Grade, And Trim Level

Cut matters because muscle groups differ. Grade and trim matter because they change intramuscular fat and exterior fat. The USDA retail beef cuts dataset lists steak items with defined trim levels and standard cooking methods, which is why it’s handy for comparisons.

How Many Grams Protein In Steak? Cut-By-Cut Numbers

If you want a fast answer, use this rule of thumb: a cooked 3-ounce (85 g) steak portion often sits in the mid-20s for grams of protein. Then adjust based on cut and whether you’re eating a lean slice or a fatty edge.

The protein values below come from the USDA’s retail beef cuts dataset, which reports protein for both “lean and fat” and “lean only” cooked portions for defined cuts and cooking methods. See the USDA PDF where you see the full nutrient panels and the exact serving weights used in the tables. USDA retail beef cuts dataset

How To Read The Numbers

• Per 85 g cooked matches a common 3-ounce cooked serving.
• Lean only is the trimmed, meat-heavy portion.
• Lean and fat includes separable fat, so protein can look a bit lower per serving.

Use the table as a menu: find your cut, match your portion size, and you’ve got a practical protein estimate without a lot of fuss.

How To Estimate Protein For Any Steak You Buy

Let’s get practical. You might be staring at a 10-ounce ribeye at a restaurant, or a pack of sirloin at home, with no clue what “3 ounces cooked” looks like. Use one of these quick methods.

Method 1: Start With Cooked Weight

If you can weigh the cooked steak, you’re set. Many cooked steak cuts in USDA tables fall between 26 g and 31 g protein per 85 g cooked (lean and fat versions). You can scale that number up or down based on your cooked weight.

• Cooked steak weight (grams) ÷ 85 = serving multiples
• Serving multiples × protein per 85 g = estimated protein grams

Example math, done with a real cut from the USDA table: top sirloin (select), lean and fat, cooked by broiling lists 27 g protein per 85 g cooked. A 170 g cooked portion is 2 servings of 85 g, so it lands at about 54 g protein.

Method 2: Use A “Palm” Portion When You Can’t Weigh

In day-to-day meals, you may not have a scale. A palm-size portion (not counting fingers) often lands near 3–4 ounces cooked for many adults. Treat that as a single serving from the table, then adjust up if your plate holds two palms’ worth.

This isn’t lab-grade. It’s a kitchen shortcut that still keeps you in the right neighborhood.

Method 3: Use The Nutrition Facts Label When It’s Available

Packaged steak strips, pre-marinated steak bites, and ready-to-eat beef products often carry a Nutrition Facts label. Use the grams of protein per serving printed on the label, since that value is tied to the stated serving size.

The FDA’s interactive Nutrition Facts label guide for protein walks through how to read protein grams per serving and why the % Daily Value line is often blank for protein. FDA protein on the Nutrition Facts label (PDF)

If you’re curious about the regulation language behind nutrition labeling, the protein declaration rules sit inside the FDA’s nutrition labeling regulation. 21 CFR 101.9 nutrition labeling of food

Protein In Cooked Steak Cuts At A Glance

The rows below use cooked values listed by USDA for the same serving weight (85 g) across several steak cuts and grades. The point isn’t to crown a winner. It’s to show you the normal range you’ll see at the table.

Steak Cut And Cook Method	Protein Per 85 g Cooked	What That Means On A Plate
Top sirloin, select, broiled (lean and fat)	27 g	Lean cut; solid “default steak” number
Top sirloin, choice, broiled (lean and fat)	26 g	Slightly more fat; protein dips a touch
Tenderloin, select, broiled (lean and fat)	26 g	Soft texture; protein stays in the same band
Tenderloin, choice, broiled (lean and fat)	28 g	Higher cooked protein per serving in this dataset
Flank, select, broiled (lean and fat)	28 g	Lean, thin cut; often eaten sliced across the grain
Flank, choice, broiled (lean and fat)	26 g	Still strong protein; watch portion size at restaurants
Top loin (strip), select, broiled (lean and fat)	26 g	Classic steakhouse cut; mid-20s is normal
Top round, select, broiled (lean and fat)	31 g	Extra lean muscle; higher protein concentration
Outside round (Biceps femoris), select, grilled (lean and fat)	27 g	Often sold as “Western griller”; protein stays steady

That’s the punchline: steak protein isn’t mysterious. Most cooked portions cluster from the mid-20s into low-30s grams per 85 g, depending on how lean the cut is and how much fat you eat.

Why Lean Cuts Often Show Higher Protein Per Ounce

Two steaks can weigh the same and still deliver different protein grams if one has more fat. That’s because fat adds calories, not protein.

You can see this effect inside the USDA tables where “lean only” cooked portions frequently show a higher protein value than “lean and fat” for the same cut and cooking method. In plain terms: trimming the fat cap doesn’t just cut calories; it can bump protein density in each bite.

What This Means For Popular Cuts

• Top round is lean, so protein per cooked ounce tends to run higher.
• Top loin (strip) sits in the middle; protein stays solid, but fat marbling can lower density.
• Tenderloin is leaner than many steakhouse cuts, so it holds its own on protein even with a softer texture.
• Flank is lean and thin; people often eat bigger portions because it feels “light.” The grams add up fast.

Portion Math You Can Use Without Guesswork

Once you know one reference point, you can scale to any steak size. The table below gives a simple range based on the cooked steak values shown across the USDA cut list above. It’s meant for quick planning: meal prep, tracking macros, or building a plate around a protein target.

Cooked Steak Portion	Protein Range	How To Pick The Right End
3 oz (85 g)	26–31 g	Use 31 g for lean cuts like top round; use 26 g for fattier bites
4 oz (113 g)	35–41 g	Multiply the 3 oz range by 1.33
6 oz (170 g)	52–62 g	Multiply the 3 oz range by 2
8 oz (227 g)	69–83 g	Multiply the 3 oz range by 2.67
12 oz (340 g)	104–124 g	Multiply the 3 oz range by 4

These ranges come from the cooked steak values shown in the USDA dataset for several steak cuts, grades, and trims. It’s a practical band, not a promise. Your cooking method, trim, and how much fat you eat will shift the number.

Cooking Choices That Affect What You Count

If you’re counting protein, the cooking method matters less than the final cooked weight. Still, a couple kitchen habits keep your numbers cleaner.

Watch The Rest And Slice Loss

Resting steak keeps juices in the meat. Slice too soon and you can lose weight in the form of liquid on the cutting board. Less cooked weight means your protein grams in the meat stay close, but your portion on the plate shrinks.

Use A Thermometer For Safety, Not Guessing

Cooking to a safe internal temperature is about food safety, not protein. For whole cuts of beef like steaks, USDA guidance calls for 145°F (63°C) and a rest time before eating. USDA “Cooking Meat: Is It Done Yet?”

Different doneness levels are a taste call. Safety is a separate issue. If you cook past medium, you’ll usually lose more water, which can raise protein per ounce on paper while leaving you with a smaller steak.

Shopping Notes That Help You Hit A Protein Target

If your goal is “X grams of protein for dinner,” shopping well makes the math easy.

Pick The Cut That Matches Your Usual Portion

If you like bigger plates, lean cuts help you stack protein without leaning on fat calories. Top round and sirloin can be friendly choices. If you prefer a rich, marbled steak, you can still hit the same protein target—just plan for a little more cooked weight to reach it.

Trim Decisions Make A Visible Difference

Trimming the exterior fat after cooking is simple: you keep the flavor from cooking with it, then you choose how much ends up on the fork. That choice shifts protein density for your bite, even if the steak started the same.

Restaurant Steaks: Watch The Serving Size

Many restaurant steaks are 8–14 ounces before cooking. That can mean two to four “3-ounce cooked servings” depending on how the kitchen cooks it and how much weight the steak drops on the grill. If you’re tracking, ask for the listed raw weight, then plan on eating half and saving the rest if you need a tighter number.

Quick Takeaways

• A cooked 3-ounce (85 g) steak portion often lands at 26–31 g protein across common steak cuts listed in USDA retail beef tables.
• Lean cuts and lean bites push toward the higher end of the range; fattier bites drift lower per ounce.
• If you can weigh cooked steak, scale protein by portion size using the table range or a cut-specific value.
• If a Nutrition Facts label exists, use protein grams per serving printed on the package.