Fish & Seafood
Protein in Fish: Protein, Calories, and Meal Ideas
Cooked fish is usually a high-protein complete animal food, with many species landing around 18-27 g protein per 100 g.
Protein per serving
22g
100 g cooked fish / about 3.5 oz
Calories per serving
130
100 g serving
Protein per 100g
22g
130 calories per 100 g
Protein density
16.9g
protein per 100 calories
Fish Nutrition Snapshot
| Measure | Amount | Protein | Calories |
|---|---|---|---|
| Typical serving | 100 g cooked fish / about 3.5 oz | 22g | 130 |
| Per 100 g | 100 g | 22g | 130 |
| Protein density | 100 calories | 16.9g | 100 |
Representative source entry: Fish, cooked, representative species average. Use species-specific entries when possible. Fatty fish, lean white fish, canned fish, breaded fish, and fried fish can differ sharply.
Good for weight loss? Excellent
Plain baked, grilled, steamed, or poached fish can be excellent for weight loss because it delivers high protein without many calories.
Good for muscle gain? Good
Fish provides complete protein, but lean fish often needs rice, potatoes, pasta, beans, or fats added when muscle-gain meals require more calories.
Meal Ideas with Fish
Grilled fish with rice and vegetables
White fish tacos with cabbage slaw
Salmon bowl with potatoes and greens
Canned tuna or sardines with toast and salad
How to Use Fish
Quick Answer
Most cooked fish lands around 18-27 g protein per 100 g, depending on species and cooking method. A useful everyday estimate for cooked fish is about 22 g protein per 100 g, with lean white fish usually lower in calories and fatty fish higher in calories.
- 100 g cooked fish average: about 22 g protein.
- 3 oz cooked fish: about 19 g protein from the same average.
- Fresh tuna, halibut, tilapia, cod, salmon, sardines, and shrimp should be tracked with species-specific entries when possible.
Lean Fish vs Fatty Fish
Lean white fish is usually the best choice when calories are tight. Fatty fish can still be excellent, but it brings more calories because it contains more fat, including omega-3 fats in choices like salmon and sardines.
- Lean fish examples: cod, tilapia, pollock, haddock, halibut, and many white fish fillets.
- Fatty fish examples: salmon, sardines, mackerel, trout, and some tuna cuts.
- Canned fish should be tracked by drained weight and label details, especially if packed in oil.
Tracking and Safety Notes
Fish nutrition changes most when the fish is battered, fried, packed in oil, or served with butter and creamy sauces. Mercury guidance also differs by species, so rotate fish choices and follow local advice when eating fish often.
- Use cooked plain fish values for grilled, baked, steamed, or poached fish.
- Track breading, frying oil, tartar sauce, butter, and marinades separately.
- Use FDA/EPA fish advice for pregnancy, children, and higher-mercury fish choices.
How Fish Compares for Protein Density
Fish works as a seafood protein with about 22 g protein and 130 calories per 100 g. That equals 16.9 g protein per 100 calories, or about 5.9 calories per gram of protein. This density number is useful because two foods can both look high protein while one needs far more calories to deliver the same protein target.
Fish sits close to the related-food average for protein density, so the best choice usually comes down to calories, preparation, taste, and how easy it is to repeat. Fish and seafood pages should be read with cooking method in mind. Plain baked, grilled, steamed, or dry-heat seafood is usually very different from breaded, fried, butter-poached, or restaurant seafood. Use the comparison table as a planning shortcut: choose the higher-density option when calories are limited, and choose the more calorie-dense option when appetite is low or muscle-gain meals need to be easier to finish.
| Food | Serving protein | Protein / 100g | Protein / 100 cal |
|---|---|---|---|
| Tuna | 33g | 25g | 21.6g |
| Cod | 31g | 21g | 20g |
| Fish | 22g | 22g | 16.9g |
| Atlantic Salmon | 20.4g | 20.4g | 9.8g |
Best Uses for Fish
For Weight Loss or Calorie Control
Fish is especially useful in a calorie deficit because the protein serving is strong relative to calories. Build the plate around the protein first, then add vegetables, fruit, potatoes, beans, or grains based on hunger and training needs. For this page's representative serving, 100 g cooked fish / about 3.5 oz gives about 22 g protein. If your meal target is 30 g protein, that is roughly 1.4 typical servings, or about 136.4 g by weight. This is why weighing the first few servings is useful: it turns a vague protein food into a repeatable meal component.
For Muscle Gain or Higher-Calorie Meals
Fish provides complete protein, but lean fish often needs rice, potatoes, pasta, beans, or fats added when muscle-gain meals require more calories. When using fish for muscle gain, the question is not only whether it contains protein; it is whether the whole meal has enough total protein, carbohydrates, and calories to support training. If you need more calories, pair it with rice, potatoes, pasta, avocado, or olive oil. If you need fewer calories, keep the cooking method dry and use vegetables or salad for volume. A practical muscle-gain plate is to keep the fish portion consistent, then adjust rice, pasta, oats, potatoes, bread, beans, oil, nuts, or dairy up or down depending on your calorie target.
For Meal Prep and Repeatable Tracking
Fish is easiest to track when the serving method stays the same from week to week. Choose one default serving, log it with the matching raw, cooked, dry, drained, or label-based entry, and then build meals around that known number. Good repeatable options include Grilled fish with rice and vegetables, White fish tacos with cabbage slaw, Salmon bowl with potatoes and greens, and similar meals where the protein portion is measured before sauces and toppings are added.
Exact Serving Conversions
Serving conversions help when your food scale, recipe, or tracking app uses a different unit than this page. For Fish, 1 oz is about 28.35 g and provides roughly 6.2 g protein and 36.9 calories based on the representative per-100-g values. Half of the typical serving gives about 11 g protein and 65 calories, while a double serving gives about 44 g protein and 260 calories.
Use gram targets when precision matters. To get 25 g protein from fish, you need about 113.6 g, which is roughly 147.7 calories. To get 30 g protein, use about 136.4 g and 177.3 calories. To get 40 g protein, use about 181.8 g and 236.4 calories. These estimates are based on the USDA or representative source entry listed below, so the label on your exact product should win when there is a difference.
| Target | Approx. amount | Calories | Typical servings |
|---|---|---|---|
| 25g protein | 113.6g | 147.7 | 1.1x |
| 30g protein | 136.4g | 177.3 | 1.4x |
| 40g protein | 181.8g | 236.4 | 1.8x |
Raw, Cooked, Dry, or Label Weight?
The best tracking rule for Fish is simple: match the database entry to the state of the food when you weighed it. This page uses Fish, cooked, representative species average as the representative source entry, with the serving shown as 100 g cooked fish / about 3.5 oz. Use species-specific entries when possible. Fatty fish, lean white fish, canned fish, breaded fish, and fried fish can differ sharply.
For seafood, the most common tracking mismatch is using a plain cooked fillet entry for a fried, sauced, or battered serving. If you batch cook, portion after cooking only when your tracker entry is also cooked. If you weigh before cooking, use a raw or dry entry and divide the finished batch into servings after cooking. If you are eating a packaged product, the label is normally the most specific source because brands can change water, sodium, sugar, fat, fortification, and serving size.
The most reliable workflow is to choose one method and repeat it: weigh the food, choose the matching raw, cooked, dry, drained, or packaged entry, then log oils, sauces, toppings, sides, and drinks separately. This avoids the most common protein tracking error, which is accidentally counting a prepared meal as if it were a plain serving of fish.
Common Mistakes with Fish
Most mistakes with Fish are not about the protein number itself; they are about matching the wrong food form, ignoring preparation, or forgetting the extra ingredients that travel with the serving. Avoid these issues before comparing your intake against a daily target from the protein calculator.
- Using a generic fish entry when the actual food is cooked, raw, flavored, breaded, sweetened, packed in oil, or from a specific brand.
- Counting Fish as the entire meal even when the real calorie load comes from oil, dressing, sauce, bread, rice, tortillas, cheese, nuts, or toppings.
- Estimating by eye instead of weighing the first few times. A small portion change can move the meal by 5-15 g of protein or by a few hundred calories for calorie-dense foods.
- For seafood, the most common tracking mismatch is using a plain cooked fillet entry for a fried, sauced, or battered serving.
- Choose species-specific entries for salmon, tuna, cod, tilapia, halibut, sardines, or shrimp.
- Track drained weight for canned fish.
- Track breading, frying oil, butter, tartar sauce, and marinades separately.
Building a High-Protein Meal with Fish
Start with the protein target, not the recipe name. A light snack might only need 10-20 g protein, while a main meal often works better at 30-45 g protein depending on body size, meal frequency, and training. With Fish, a 30 g protein meal is approximately 136.4 g of the representative food before sides and toppings. If that portion feels too large, combine a smaller amount of fish with another protein from the related-food list.
A balanced plate usually needs more than protein. Pair fish with a fiber source, a carbohydrate source if you train or need energy, and enough fat to make the meal satisfying. For lower-calorie meals, keep sauces light and increase vegetables. For higher-calorie meals, add rice, pasta, potatoes, bread, oats, beans, dairy, nuts, seeds, avocado, or oil depending on the type of food and your goal.
If the meal is meant to be repeated, write down the exact version that worked: the grams of fish, the cooking method, the sides, and the sauce. That gives you a reusable meal template instead of a one-time estimate, and it makes future protein targets easier to hit without redoing the math every day.
Tracking Tips
- Choose species-specific entries for salmon, tuna, cod, tilapia, halibut, sardines, or shrimp.
- Track drained weight for canned fish.
- Track breading, frying oil, butter, tartar sauce, and marinades separately.
Compare Similar Protein Foods
Related Calculators and Guides
Common Questions
How much protein is in fish per 100 g?
Most cooked fish provides about 18-27 g protein per 100 g. A practical generic estimate is about 22 g per 100 g cooked fish.
Which fish is highest in protein?
Fresh tuna, halibut, tilapia, cod, and some lean white fish entries often score very high for protein density. Salmon is still high protein, but it has more calories from fat.
Is fish better than chicken for protein?
Both are strong complete proteins. Chicken breast is usually leaner per calorie, while fish adds seafood nutrients and can be very lean depending on the species.
Does fried fish have the same protein?
The fish protein remains useful, but fried fish has more calories from breading and oil. Track fried fish with a fried entry instead of plain cooked fish values.
Sources reviewed
- USDA FoodData Central: fish, cooked search - U.S. Department of Agriculture
- FDA/EPA Advice About Eating Fish - U.S. Food and Drug Administration
- International Society of Sports Nutrition Position Stand: protein and exercise - Journal of the International Society of Sports Nutrition