Whole foods such as chicken breast, eggs, lentils, Greek yogurt, and tofu deliver protein in its natural package, complete with fats, fiber, vitamins, and minerals that isolated powders do not provide. That makes them the backbone of most high-protein meal plans, whether you are an athlete tracking macros, a vegetarian looking for more plant protein, or someone who simply wants meals that keep you full.
This calculator works out the protein and calorie content of 19 common whole foods. Pick a food, enter a serving in grams or ounces, and optionally set a daily protein target. You will instantly see how much protein your serving provides, what share of its calories come from protein, how it compares with your daily goal, and how much of that food you would need to hit your target.
Nutrient values are based on USDA FoodData Central entries for cooked, ready-to-eat portions. Use the tool for meal planning, smarter grocery choices, or just to find out which foods really earn their protein reputation.
🥩 Whole Protein Calculator
Protein, calories & daily-target math for 19 whole foods.
1. Choose your food
2. Serving size
3. Daily protein target (optional)
Step-by-Step Guide
- Select a food from the dropdown. The list covers 19 common whole foods: poultry, beef, fish, eggs, dairy, soy, legumes, grains, nuts, and oats.
- Enter the amount you ate or plan to eat, then choose grams or ounces. The tool handles the unit conversion automatically.
- Optionally enter a daily protein target in grams. Doing this unlocks two extra outputs: what percentage of your daily goal this serving covers, and how many grams of that food you would need to hit the target.
- Press Calculate to see the full breakdown. Press Reset to clear everything, or tap a quick preset like 100 g or 1 oz to test common portions.
Formula Explained
Each food in the database is described by two base numbers per 100 grams: protein content and total calories. These come from the USDA FoodData Central reference database. To calculate your serving, the tool first converts ounces to grams using 1 oz = 28.3495 g. Then it applies simple linear scaling:
Protein = protein per 100 g × serving grams ÷ 100
Calories = calories per 100 g × serving grams ÷ 100
The percentage of calories from protein uses the standard energy density of protein, roughly 4 kcal per gram. So the formula becomes:
% calories from protein = (protein × 4 ÷ total calories) × 100
Finally, if you provide a daily target, the tool calculates the serving's contribution to that target and the amount of food needed to reach it:
Needed food = target protein ÷ protein per 100 g × 100
Worked Examples
Example 1 — Chicken breast. A 150 g cooked chicken breast contains about 46.5 g protein and 247 kcal. Protein supplies about 186 kcal, so roughly 75% of its calories come from protein — an excellent ratio for lean mass goals. To hit a 120 g daily target, you would need about 387 g of cooked chicken breast.
Example 2 — Almonds. A 30 g handful of almonds provides about 6.3 g protein and 174 kcal. Only about 14% of those calories come from protein because almonds are mostly fat. That does not make them bad — they are nutrient-dense — but it shows why nuts are better used as a calorie source than a primary protein source.
Tips for High-Protein Whole Foods
- Meat and seafood are protein-dense. Chicken breast, turkey, tuna, and lean beef deliver 25–31 g protein per 100 g with relatively few calories.
- Dairy can stretch your budget. Greek yogurt and cottage cheese pack 10–12 g protein per 100 g and pair well with fruit, oats, or savory toppings.
- Plant eaters should combine sources. Tofu, tempeh, lentils, chickpeas, and edamame are good whole-food proteins, but their protein-to-calorie ratio is lower than animal sources. Pair them with grains and nuts to reach higher targets.
- Watch the fat in nuts and nut butters. Peanut butter and almonds are calorie-dense; a serving of peanut butter has more calories than most people expect.
- Cooked vs. raw matters. This calculator uses cooked, ready-to-eat portions for meat, fish, legumes, and eggs, so weigh your food after cooking for the most accurate numbers.
Reference Table: Protein and Calories per 100 g
Values below are approximations from USDA FoodData Central. Actual numbers vary by brand, cut, and cooking method.
| Food | Protein (g/100 g) | Calories (kcal/100 g) |
|---|---|---|
| Chicken breast (cooked) | 31 | 165 |
| Turkey breast (cooked) | 30 | 135 |
| Lean beef (cooked) | 29 | 217 |
| Salmon (cooked) | 25 | 208 |
| Canned tuna (in water) | 25 | 116 |
| Whole eggs | 13 | 143 |
| Nonfat Greek yogurt | 10.3 | 59 |
| Cottage cheese (2%) | 12 | 84 |
| 2% milk | 3.3 | 50 |
| Firm tofu | 12 | 80 |
| Tempeh | 20 | 193 |
| Lentils (cooked) | 9 | 116 |
| Chickpeas (cooked) | 8.9 | 164 |
| Black beans (cooked) | 8.9 | 132 |
| Edamame (cooked) | 11 | 120 |
| Quinoa (cooked) | 4.4 | 120 |
| Almonds | 21 | 579 |
| Peanut butter | 25 | 588 |
| Rolled oats (dry) | 13.5 | 379 |
For full nutrient profiles, search the official USDA FoodData Central database.
Common Mistakes to Avoid
- Using raw weights for cooked food. Meat loses water when cooked, so raw and cooked weights differ. Match your input to the form of the food listed in the calculator.
- Ignoring calories. A food can be high in protein but also packed with fat. Always check the calorie line, not just the protein line.
- Setting an unrealistic target. Most healthy adults need 1.2–2.0 g protein per kg of body weight if they train regularly; more than that rarely adds benefit. If a target seems too high, check it against your body weight and activity level.
- Relying on a single food. Whole-protein foods vary in micronutrients. Eating a mix of animal and plant sources gives you a wider nutrient profile.
Frequently Asked Questions
Why does cooked chicken breast have so much more protein per 100 g than I see on raw labels?
Because cooking removes water, protein concentrates as a percentage of weight. 100 g of cooked chicken is roughly 130–140 g of raw chicken in many cases. Weigh cooked meat after cooking for this tool.
Is the 4 kcal per gram of protein exact?
It is the standard Atwater factor used in nutrition labeling. In practice, protein digestibility varies slightly, but 4 kcal/g is the accepted value for meal planning.
Can I use this for recipe planning?
Yes. Enter each ingredient's weight in grams separately, and add the results together. The tool's linear math makes scaling recipes simple.
Are values for oats, almonds, and peanut butter raw or cooked?
They are as packaged. Oats are dry rolled oats, almonds are raw, and peanut butter is the jarred spread. Weigh them as you actually eat them.