Collard greens are a nutritional powerhouse, often celebrated for their fiber, vitamins A and K, and calcium. But they also contribute a meaningful amount of plant-based protein — roughly 2.5 to 3 grams per 100 grams of raw leaves. This calculator helps you determine the exact protein content of collard greens based on how you prepare and measure them, whether you're tracking macros, planning a plant-forward meal, or simply curious about your leafy green intake.
Simply enter the amount of collard greens you're using, choose the unit (grams, cups, or ounces), and select the preparation state (raw or cooked). The tool instantly converts your portion to a 100-gram equivalent and calculates the protein, along with a breakdown of calories and fiber. It's perfect for meal preppers, fitness enthusiasts, and anyone following a balanced diet who wants precise nutrition data without guesswork.
🥬 Collard Protein Calculator
Step-by-step
- Convert your portion to grams.
- Apply protein density per 100g.
- Scale to your portion.
How to Use This Tool
Using the collard protein calculator is straightforward. Start by entering the amount of collard greens you plan to eat. You can type a number directly or use the quick-fill buttons for common portions like 100 grams, one cup raw, one cup cooked, or four ounces. Next, choose the unit that matches how you measured your greens — grams, cups (raw or cooked), or ounces. Finally, select whether your collards are raw or cooked (boiled and drained), because cooking changes the water content and slightly concentrates the protein per 100 grams.
Click Calculate Protein to see the protein content per 100 grams, along with the total protein in your portion, the estimated weight of your portion, and approximate calories and fiber. The step-by-step breakdown shows exactly how the conversion and scaling were done, so you can verify the math or adjust for your own data.
How It Works
The calculator uses standard nutrition data for collard greens. Raw collard greens contain about 2.5 grams of protein per 100 grams, while cooked (boiled, drained) collards contain about 2.7 grams per 100 grams. The slight increase in cooked collards is due to water loss during cooking, which concentrates nutrients. The tool also provides approximate calories (32 kcal per 100g raw, 35 kcal per 100g cooked) and fiber (3.6g raw, 4.0g cooked) based on USDA FoodData Central values.
To convert your portion to grams, the calculator uses these standard conversions: 1 cup of raw chopped collards weighs about 36 grams, 1 cup of cooked collards weighs about 170 grams, and 1 ounce equals 28.35 grams. Once the weight in grams is known, the protein is calculated by multiplying the weight by the protein density (grams per 100g) and dividing by 100.
Worked Examples
Example 1: You eat 1 cup of raw chopped collards. Enter 1, select “cups (raw, chopped)”, and choose “Raw”. The tool converts 1 cup to 36 grams. Protein = (36/100) × 2.5 = 0.9 grams. So your portion provides just under 1 gram of protein.
Example 2: You eat 200 grams of cooked collards. Enter 200, select “grams”, and choose “Cooked”. Protein = (200/100) × 2.7 = 5.4 grams. This is a more substantial protein contribution, especially when paired with beans or grains.
Example 3: You have a recipe that calls for 4 ounces of raw collards. Enter 4, select “ounces”, and choose “Raw”. The tool converts 4 oz to 113.4 grams. Protein = (113.4/100) × 2.5 = 2.8 grams.
Tips & Best Practices
- Weigh your collards raw for the most accurate tracking, as cooking methods vary in water loss.
- If you use frozen collards, note that they are typically blanched before freezing, so their protein density is closer to cooked values.
- Combine collards with legumes, quinoa, or nuts to create a complete protein profile for plant-based meals.
- Use the calorie and fiber estimates as a guide; actual values can vary slightly by variety and growing conditions.
Factors Affecting Accuracy
The protein content of collard greens can vary by a few tenths of a gram depending on the cultivar, soil, and harvest time. Cooking method also matters — boiling leaches some water-soluble nutrients, but protein is largely retained. The values used here are averages from the USDA FoodData Central database, which is a reliable reference for most purposes. For clinical or research applications, always consult the specific nutrition label or a laboratory analysis.
Frequently Asked Questions
Are collard greens a good source of protein?
Collard greens are not a high-protein food compared to meat or legumes, but they contribute useful plant protein, especially when eaten in large quantities. A 100-gram serving (about 3.5 ounces) provides roughly 2.5–2.7 grams, which is similar to other leafy greens like kale and spinach.
Does cooking increase the protein per 100g?
Yes, because cooking removes water, the same amount of collards weighs less, so the protein becomes more concentrated per 100 grams. However, the total protein in your portion stays roughly the same unless you discard the cooking water (which may contain some water-soluble nutrients, but not significant protein).
Can I use this calculator for other leafy greens?
The calculator is specifically calibrated for collard greens. For other greens like kale, spinach, or Swiss chard, you would need different density values. You can find similar tools for other vegetables on this site, such as the spinach protein calculator (if available) or use general nutrition databases.
How many grams are in a cup of collard greens?
One cup of raw chopped collard greens weighs about 36 grams, while one cup of cooked collards weighs about 170 grams. These are standard conversions used in nutrition databases.
Additional Resources
For more detailed nutrition data, you can consult the USDA FoodData Central, which provides comprehensive nutrient profiles for thousands of foods. The NIH Office of Dietary Supplements also offers evidence-based information on protein and health. If you're tracking macros for fitness, the American College of Sports Medicine provides guidelines on protein intake for athletes.