How Many Grams Of Protein In 8 Oz Filet Mignon? | Numbers That Match Your Plate

If you’ve ever logged steak and felt your numbers drift, you’re not alone. “8 ounces” sounds precise, yet the protein total can swing a lot depending on one simple detail: are you weighing the steak raw or cooked?

This article gives you a clean answer, then shows the math so you can trust it. You’ll also see the small stuff that changes the total: trim level, moisture loss, and what “filet mignon” means at the counter.

What Counts As “8 Oz” With Filet Mignon

People say “8 oz filet” in two ways, and they’re not the same thing.

• 8 oz raw: weight on the package or on your scale before cooking.
• 8 oz cooked: weight after the steak is seared, grilled, or broiled.

Cooking drives off water and renders some fat. The steak gets lighter, so the protein per ounce looks higher after cooking. That’s why a cooked 8-oz serving usually has more protein than a raw 8-oz portion.

Protein In An 8-Ounce Filet Mignon Serving: Raw Vs Cooked

For a dependable baseline, use USDA-derived nutrient entries for beef tenderloin (the cut used for filet mignon) and keep the math tied to weight.

Raw reference: beef tenderloin steak (boneless, trimmed to 0″ fat) lists 21.9 g protein per 100 g. That’s a clean “lean” style entry many people match when they trim visible fat. Data source: USDA-derived tenderloin nutrition entry.

Cooked reference: beef tenderloin steak (trimmed to 1/8″ fat, cooked, broiled) lists 29 g protein per 100 g. Data source: USDA-derived cooked tenderloin nutrition entry.

Now the conversion: 8 oz = 226.8 g.

• 8 oz raw filet mignon: 226.8 g × (21.9 g protein / 100 g) = 49.7 g protein
• 8 oz cooked filet mignon: 226.8 g × (29 g protein / 100 g) = 65.8 g protein

That’s the reason you’ll see two different answers online. Both can be right. They’re just using different weights.

How Many Grams Of Protein In 8 Oz Filet Mignon?

If you want the simplest “use it tonight” answer, pick the line that matches how you measure your food.

• Weighing raw: plan on 50 g protein for an 8-oz filet mignon.
• Weighing cooked: plan on 66 g protein for an 8-oz cooked filet mignon.

One more practical note: many restaurants list filet size as raw weight. Many meal-prep folks weigh cooked portions. If your tracking app looks “off,” this mismatch is often why.

Want to check your own cut? The most direct path is to look up the exact tenderloin entry you’re using in USDA FoodData Central, then keep raw with raw and cooked with cooked.

Why Cooked Weight Often Shows More Protein Per Ounce

Protein doesn’t vanish in the pan. The steak loses mostly water as it cooks, so each cooked ounce holds a bigger share of the original protein.

USDA researchers publish cooking yield factors that show how meat weight changes during cooking, driven by moisture and fat loss. If you’re the type who likes receipts, that’s the document behind the “your steak shrank” reality: USDA Table of Cooking Yields for Meat and Poultry (Release 2).

So what does that mean for your plate? A common pattern is:

• You start with 8 oz raw.
• After cooking, you might end with 6–7 oz cooked depending on method and doneness.
• The total protein you eat stays tied to the starting steak, but the protein per ounce rises as weight drops.

If you’re weighing cooked portions for meal prep, that’s fine. Just use cooked nutrition numbers so your log stays consistent.

Protein Math For Filet Mignon Portions

This table keeps the protein math in one place. Use it as a quick reference when you’re buying steaks, splitting a pack, or building a meal plan.

Table notes: “Raw” uses 21.9 g protein per 100 g from a lean-trim tenderloin entry. “Cooked” uses 29 g protein per 100 g from a broiled tenderloin entry. Both are USDA-derived values.

Small Details That Change The Total

Two filet mignons can share the same label weight and still land a bit apart on protein. Here’s what moves the number in real kitchens.

Trim Level And Grade

A filet with more visible fat has less protein per 100 g than a closely trimmed one, since fat takes up “space” in the weight. Grade can shift fat content too. The swing usually isn’t wild, but it’s there.

Doneness And Moisture Loss

Rare and medium-rare steaks hold more water than well-done steaks. That water adds weight without adding protein, so a juicier steak can show fewer grams of protein per ounce when you weigh it cooked.

Cooking Method

Broiling, grilling, and pan-searing can lead to different drip loss. The bigger the moisture loss, the more concentrated the protein becomes per ounce of cooked steak.

Resting And Slicing

Resting helps juices stay in the meat instead of spilling on the board. If you slice right away, you can lose more liquid, lowering cooked weight. Your protein intake stays close, but your “per-ounce” math can shift if you’re weighing after slicing.

How To Get The Most Accurate Number At Home

If you want your tracking to match what you actually eat, stick to one method and repeat it the same way every time.

Option 1: Weigh Raw And Log Raw

1. Pat the steak dry and weigh it raw.
2. Use a raw tenderloin entry from USDA FoodData Central (or an app that cites it).
3. Cook it any way you like. Your logged protein already matches what you started with.

Option 2: Weigh Cooked And Log Cooked

1. Cook the steak, rest it, then weigh the portion you’ll eat.
2. Use a cooked tenderloin entry that matches your method (broiled, grilled, roasted).
3. Stay consistent with doneness when you can, since moisture loss shifts cooked weight.

If you mix the two (raw entry with cooked weight, or cooked entry with raw weight), your protein log can jump by 10+ grams on the same steak. That’s not your body “doing something weird.” It’s the math.

How Filet Mignon Protein Fits Into A Day

Labels and nutrition tools often reference a Daily Value for protein of 50 g. That number is used for labeling context, not as a personal target for everyone. You can see the FDA’s Daily Value list here: FDA Daily Value on the Nutrition Facts label.

Using that labeling yardstick:

• An 8-oz raw filet mignon at ~49.7 g protein sits near the 50 g label reference.
• An 8-oz cooked filet mignon at ~65.8 g protein goes beyond that label reference.

If you’re spacing protein across meals, a filet this size can cover a big share of the day’s total for many people. If that’s more than you want in one sitting, split the steak, pair it with sides, and save the rest for tomorrow’s lunch.

Portion Planning Without Guesswork

Here are a few real-world moves that make filet mignon protein easier to plan.

Buying For Two

If you have one 8-oz filet and you’re splitting it, each person gets about 25 g protein if you treat the steak as 8 oz raw and split evenly (49.7 ÷ 2).

Meal Prep For A Protein Target

If your target is ~35–40 g protein for a meal, a 6-oz raw filet lands at ~37.3 g. That’s a clean portion with minimal math.

Restaurant Menus And “Center-Cut” Claims

Menus often list raw weight and may use terms like “center cut.” That language can signal a tenderloin portion with consistent shape, not a different protein profile. When in doubt, treat the listed ounces as raw weight unless the menu says “cooked weight.”

What Changes And What Stays The Same

There’s a comforting takeaway here: the steak’s protein is mostly set by how much lean meat you start with. Cooking changes water and fat loss, which changes the scale reading and the protein per ounce you calculate.

This table sums up the big levers so you can spot what’s driving differences when two logs don’t match.

If you want a clean rule you can stick to: choose one weighing style and stay loyal to it. Your numbers will stop wobbling, and you’ll still eat the same steak.

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