Walnuts are a popular tree nut prized for their rich, buttery flavor and impressive nutritional profile. While they are best known for their heart-healthy omega-3 fatty acids, walnuts also provide a meaningful amount of plant-based protein — about 15 grams per 100 grams. This makes them a valuable addition to vegetarian, vegan, and high-protein diets.
Our Walnut Protein Per 100g Calculator helps you quickly determine the protein content in any serving of walnuts, whether you're tracking macros, planning meals, or comparing nuts. Simply enter the weight of your walnut serving (in grams or ounces), and the tool instantly calculates the protein grams, along with a breakdown of calories, fat, and carbs per 100g. Perfect for nutritionists, fitness enthusiasts, and anyone curious about the protein punch in their handful of walnuts.
🥜 Walnut Protein Per 100g
How to Use This Tool
Using the Walnut Protein Per 100g Calculator is straightforward. Enter the weight of your walnut serving in grams or ounces, then click "Calculate." The tool instantly displays the protein, fat, carbohydrates, and calories for that specific serving size. You can also click one of the preset buttons (1 oz, 30g, 50g, 100g) to quickly test common serving sizes. The results are based on standard nutritional data for raw English walnuts (Juglans regia).
Tip: For the most accurate tracking, weigh your walnuts on a kitchen scale rather than relying on volume measurements. A typical handful of walnut halves weighs about 30 grams.
Formula Explained
The calculator uses a simple proportional formula based on the nutritional composition per 100 grams of raw walnuts. The standard values used are:
- Protein: 15.2 g per 100g
- Fat: 65.2 g per 100g
- Carbohydrates: 13.7 g per 100g
- Calories: 654 kcal per 100g
For a given weight W (in grams), the calculation is:
Nutrient amount = (Nutrient per 100g) × (W / 100)
If you enter ounces, the tool first converts to grams (1 oz = 28.3495 g) before applying the formula. These values are sourced from the USDA FoodData Central database, which is the standard reference for nutritional composition.
Worked Examples
Example 1: You eat a 1-ounce (28g) serving of walnuts.
Protein = 15.2 × (28 / 100) = 4.3 g
Calories = 654 × (28 / 100) = 183 kcal
Example 2: You add 50g of chopped walnuts to your oatmeal.
Protein = 15.2 × (50 / 100) = 7.6 g
Fat = 65.2 × (50 / 100) = 32.6 g
Example 3: A recipe calls for 120g of walnuts.
Protein = 15.2 × (120 / 100) = 18.2 g
Carbohydrates = 13.7 × (120 / 100) = 16.4 g
Tips & Best Practices
- Weigh before chopping: If a recipe calls for chopped walnuts, weigh them whole before chopping for the most accurate measurement.
- Storage matters: Walnuts can go rancid due to their high fat content. Store them in an airtight container in the refrigerator or freezer to preserve freshness and nutritional quality.
- Compare with other nuts: Walnuts have a higher fat content than almonds or pistachios but also offer unique omega-3 fatty acids (ALA). Use our Almond Fat Per 100g Calculator to compare.
- Incorporate into meals: Sprinkle walnuts on salads, yogurt, or oatmeal; blend into pesto; or use as a crust for fish or chicken for a protein and healthy fat boost.
Frequently Asked Questions
Q: Are walnuts a good source of protein?
A: Yes, walnuts provide about 15g of protein per 100g, which is moderate among nuts. While not as high as peanuts or almonds, they are an excellent source of plant-based protein, especially when combined with other protein-rich foods like legumes or whole grains.
Q: How does walnut protein compare to animal protein?
A: Walnut protein is incomplete, meaning it lacks sufficient amounts of some essential amino acids (particularly lysine). However, when eaten as part of a varied diet, walnuts contribute valuable protein along with healthy fats and fiber. Pairing walnuts with grains or legumes can create a complete protein profile.
Q: Can I use this calculator for other types of walnuts?
A: The calculator uses data for raw English walnuts. Black walnuts and other varieties may have slightly different nutritional profiles. For the most accurate results, refer to the specific product's nutrition label.
Q: Do roasted or salted walnuts have the same protein content?
A: Dry-roasted walnuts have a similar protein content per 100g, but oil-roasted or salted varieties may have slightly altered fat and sodium levels. Always check the label for the most accurate information.
Real-World Applications
This calculator is useful for meal planning, macro tracking, and recipe development. Whether you're following a high-protein diet, managing diabetes, or simply curious about the nutritional value of your snacks, knowing the exact protein content helps you make informed choices. Walnuts are also a staple in many cuisines — from Mediterranean to Middle Eastern — and this tool helps you adapt traditional recipes to your dietary needs.
For more detailed nutritional comparisons, explore our Pecan Nutrition Calculator or Peach Fiber Calculator for other whole foods.