Half a cooked chicken breast usually gives you about 20 to 26 grams of protein, with the count shifting by weight, skin, and cooking style.
When people ask how much protein in half chicken breast, they usually want one number they can log and move on. The snag is that “half” can mean half of a large fillet, one breast half from a smaller bird, or half of a measured serving. That gap changes the protein count by more than most people think.
If you want a plain, useful range, use 20 to 26 grams for half of a cooked, boneless, skinless chicken breast. That range fits what lands on most dinner plates. If your piece is small, it can dip under that. If it is thick and meaty, it can climb past it.
Half Chicken Breast Protein By Cooked Weight
The cleanest way to count chicken breast protein is by cooked weight. Roasted chicken breast lands at about 31 grams of protein per 100 grams, and the federal poultry nutrition chart puts a 3-ounce cooked serving at about 26 grams. You can check the underlying numbers in USDA FoodData Central and the FSIS chicken and turkey nutrition facts.
That means each cooked ounce of chicken breast gives you close to 8.8 grams of protein. So if your half breast weighs 2.5 ounces cooked, you are sitting near 22 grams. At 3 ounces cooked, you are right near 26 grams.
What Most People Mean By Half
In home kitchens, “half chicken breast” usually means one of two things. Some people mean half of a big boneless breast from the grocery store. Others mean one breast half, which is one side of the bird’s breast. Those are not always the same size, so the protein total will not be the same either.
A medium supermarket breast often starts at 6 to 8 ounces raw. After cooking, water cooks off, so the piece weighs less while the protein becomes more packed into each bite. Split that cooked piece in two, and each half often lands in the 70 to 85 gram zone.
Why Size And Cooking Change The Count
You do not lose much protein when chicken cooks. You mostly lose water. That is why raw chicken breast has less protein per 100 grams than cooked chicken breast, even when the meat started as the same piece.
- Raw weight is higher because the meat still holds more water.
- Cooked weight is lower, so the protein looks denser.
- Skin adds fat and calories, but not much extra protein.
- Bone-in cuts give you less edible meat than the scale suggests.
- Breading and sauce change the plate weight without adding much protein.
If you track macros, cooked weight is the safer pick. If you only have a label from the package, stick with raw numbers from the label or database and do not mix raw and cooked entries. That one slip throws off totals more than a missed pinch of seasoning ever will.
Protein labels also use a daily reference point. The FDA Daily Value for protein is 50 grams, so a half chicken breast can give you close to half of that in one shot.
| Cooked Weight | Protein | What It Usually Feels Like |
|---|---|---|
| 50 g | 15.5 g | Small sliced portion |
| 60 g | 18.6 g | Light lunch serving |
| 70 g | 21.7 g | Small half breast |
| 75 g | 23.3 g | Common half from a medium fillet |
| 80 g | 24.8 g | Solid half breast |
| 84 g | 26.0 g | Standard 3-ounce cooked serving |
| 90 g | 27.9 g | Large half breast |
| 100 g | 31.0 g | Meal-prep size serving |
How Much Protein In Half Chicken Breast? Piece Size Changes The Count
If your half chicken breast is on the smaller side, think 18 to 22 grams of protein. That is the range you will hit with a cooked piece that weighs about 60 to 70 grams. It still gives you a strong protein hit, just not the same as a thick restaurant-style portion.
If your half looks medium, 22 to 26 grams is the sweet spot. That matches a lot of home-cooked plates and most cut-up halves from standard grocery packs. This is the range most readers are after, and it is the one that usually fits real meals best.
If your half is heavy, dense, or cut from a large breast, it can push past 26 grams and head toward 28 or even 30 grams. That is not rare with meal-prep chicken, air-fried jumbo fillets, or restaurant cuts that start big and stay thick after cooking.
A Fast Way To Estimate It
If you know the cooked weight, the math is easy: multiply grams by 0.31. A 70-gram half breast gives you about 21.7 grams of protein. A 85-gram half gives you about 26.4 grams. Once you do that a few times, you can eyeball your usual portions with decent accuracy.
If you do not have a scale, use your own usual pack size as your shortcut. Say your raw boneless breast weighs 7 ounces and you split it in half after cooking. Each half will often land near 2.5 to 3 ounces cooked, which puts you right in that 22 to 26 gram zone.
| Common Situation | Cooked Weight To Count | Protein Estimate |
|---|---|---|
| Half of a small cooked breast | 60 g | 18.6 g |
| Half of a medium cooked breast | 75 g | 23.3 g |
| Half of a large cooked breast | 84 g | 26.0 g |
| One thick meal-prep half | 90 g | 27.9 g |
| Half breast with skin still on | Count the meat only if you want a clean number | Protein stays close, fat rises |
| Breaded or sauced portion | Weigh the chicken, not the coating | Use the meat weight for a clean log |
Easy Ways To Get The Number Right
You do not need lab gear or a food diary obsession to count this well. A few simple habits will keep you close enough for meal planning, muscle gain, or plain curiosity.
- Pick raw or cooked entries and stick with one system.
- Use boneless, skinless breast data when that is what you actually ate.
- Weigh cooked meat after slicing if juices pooled out on the board.
- Log by grams when you can, not by vague words like “piece” or “serving.”
The biggest mistake is mixing raw package weight with cooked nutrition data. The second biggest is counting a breaded cutlet as plain chicken breast. Fix those two things, and your protein math gets a lot cleaner.
The Range That Fits Most Plates
For most readers, the usable answer is simple: half a cooked chicken breast usually gives you 20 to 26 grams of protein. Use the low end for a smaller piece, the high end for a fuller half, and push higher only when the portion is clearly large.
If you want one default number and do not feel like fiddling with grams every time, 24 grams is a smart middle-ground estimate for half of a cooked boneless, skinless chicken breast. It is close enough for most home meals, and it lines up well with the way chicken shrinks in the pan.
References & Sources
- USDA FoodData Central.“Food Search | USDA FoodData Central.”Shows USDA entries for cooked chicken breast used for weight-based protein math.
- USDA Food Safety and Inspection Service.“Chicken and Turkey Nutrition Facts.”Lists protein for cooked chicken breast by a 3-ounce serving.
- U.S. Food and Drug Administration.“Daily Value on the Nutrition and Supplement Facts Labels.”Lists the 50-gram Daily Value for protein used on labels.
