Kale is widely celebrated as a nutrient-dense leafy green, but how much protein does it actually provide? This calculator lets you determine the protein content in kale based on a standard 100g reference, with options to adjust for different kale varieties (curly, lacinato, baby) and preparation methods (raw, cooked, frozen). Whether you’re tracking macronutrients for a plant-based diet, meal prepping, or simply curious about the nutritional profile of your greens, this tool gives you a quick, accurate estimate.
Protein content in kale can vary slightly by type and preparation. Raw kale typically contains about 4.3g of protein per 100g, while cooked kale (boiled, drained) has a higher concentration per weight due to water loss. Use this calculator to get precise values for your specific kale, and compare it to other leafy greens in your diet. Perfect for vegans, vegetarians, fitness enthusiasts, and anyone focused on whole-food nutrition.
🥬 Kale Protein Per 100g
How to Use This Calculator
Using the Kale Protein Per 100g Calculator is straightforward. Start by selecting the kale variety that matches what you have — options include raw curly kale, lacinato (dinosaur) kale, baby kale, cooked kale (boiled and drained), and frozen chopped kale. Each variety has a slightly different protein density due to water content and preparation method. Next, enter the weight of your kale serving in grams. You can type any value from 1 to 1000 grams, or use the quick-fill preset buttons for common serving sizes like 30g (1 oz), 85g (3 oz), or 150g. Click "Calculate Protein" to see the total protein content for your specific serving. The result also shows the protein per 100g for reference, making it easy to compare with other foods.
Protein Content by Kale Variety
Kale's protein content varies by type and preparation. The values used in this calculator are based on USDA FoodData Central averages. Here's a quick reference:
| Kale Variety | Protein per 100g | Notes |
|---|---|---|
| Raw Curly Kale | 4.3 g | Most common variety, high water content |
| Raw Lacinato (Dinosaur) Kale | 3.3 g | Slightly lower protein, more tender |
| Raw Baby Kale | 3.6 g | Young leaves, milder flavor |
| Cooked Kale (Boiled, drained) | 3.6 g | Water loss concentrates nutrients |
| Frozen Kale (Unprepared) | 3.7 g | Similar to raw, slightly denser |
Formula Explained
The calculation is simple: Total Protein = (Protein per 100g × Serving Weight in grams) ÷ 100. For example, if you have 85g of raw curly kale (4.3g protein per 100g), the calculation is (4.3 × 85) ÷ 100 = 3.655g of protein. The calculator rounds to two decimal places for readability. This same formula applies to all varieties, using the appropriate protein-per-100g value from the table above.
Worked Examples
Example 2: You're serving 150g of cooked kale as a side dish. Cooked kale has 3.6g protein per 100g. Protein = (3.6 × 150) ÷ 100 = 5.40g. That's a solid protein boost for a vegetable side.
Example 3: A salad recipe calls for 200g of raw lacinato kale. Lacinato has 3.3g protein per 100g. Protein = (3.3 × 200) ÷ 100 = 6.60g. Combined with other ingredients, this contributes significantly to your meal's protein total.
Why Protein in Kale Matters
Kale is often highlighted for its vitamin K, vitamin C, and antioxidant content, but its protein contribution is also noteworthy — especially for plant-based diets. While kale is not a complete protein (it lacks sufficient amounts of some essential amino acids), it pairs well with grains, legumes, nuts, and seeds to form a complete amino acid profile. For example, a kale and quinoa salad provides all nine essential amino acids. The protein in kale is also highly digestible when cooked or blended, making it a versatile addition to smoothies, stir-fries, and soups. For those tracking macronutrients, knowing the exact protein content helps with meal planning and hitting daily targets.
Frequently Asked Questions
Is kale a good source of protein? Kale provides a moderate amount of protein compared to other leafy greens. With 3–4g per 100g, it's higher than lettuce or spinach but lower than legumes or animal products. It's an excellent supplementary protein source in a balanced diet.
Does cooking kale change its protein content? Cooking does not significantly alter the protein content per gram of dry matter, but because water is lost, the protein concentration per 100g of cooked kale is slightly lower than raw (since the weight is reduced). The calculator accounts for this with separate values for raw and cooked kale.
Can I use this calculator for other greens? This calculator is specifically calibrated for kale. For other greens like spinach or collard greens, you would need different protein-per-100g values. Check out our spinach calorie calculator for a similar tool.
How accurate are the protein values? The values are based on USDA FoodData Central averages and are accurate for general dietary tracking. Individual batches may vary by up to 10–15% due to natural variation. For medical or clinical purposes, consult a registered dietitian.
Additional Resources
For more detailed nutritional data on kale and other foods, visit the USDA FoodData Central. You can also explore our chickpea protein calculator for another plant-based protein source, or the IIFYM calculator for full macronutrient tracking.