Collard greens are a nutritional powerhouse, packed with vitamins A, C, and K, plus fiber and calcium — all for very few calories. But when you're tracking your intake, portion size matters. A single "slice" of collard greens can vary widely depending on whether you're measuring raw leaves, cooked chopped greens, or a portion from a recipe. This calculator helps you estimate the calories in one slice of collard greens based on your specific portion size and preparation method.
Whether you're meal prepping, following a calorie-controlled diet, or just curious about your greens, this tool gives you a quick, accurate estimate. Simply enter the weight of your slice (in grams or ounces), choose the preparation method (raw, cooked, or frozen), and optionally adjust for added fats like olive oil or butter. The calculator will break down the calories, plus the protein, carbs, and fiber, so you can log your meal with confidence.
🥬 Collard Calories Per Slice
How to Use This Tool
Enter the weight of your collard greens slice in grams or ounces. Choose the preparation method that matches how you're eating them — raw leaves, cooked (boiled or steamed), or frozen (which is typically cooked before freezing). If you've added any fat like olive oil or butter during cooking or at the table, enter the amount and select the unit (grams, teaspoons, or tablespoons). The calculator will then show the total calories, plus a breakdown of protein, carbs, and fiber.
For a quick start, use the preset buttons to fill in common portion sizes. For example, a typical serving of cooked collard greens is about 50 grams, while a single raw leaf might weigh around 30 grams. Adjust the values to match your actual portion.
How It Works
The calculator uses standard USDA nutrition data for collard greens. Raw collard greens contain about 32 calories per 100 grams, while cooked (boiled) collards have about 35 calories per 100 grams due to water loss and concentration of nutrients. Frozen collards, which are usually cooked before freezing, come in around 30 calories per 100 grams.
For added fat, we use approximate values: olive oil provides about 8.8 calories per gram (roughly 120 calories per tablespoon), and butter provides about 7.2 calories per gram (roughly 100 calories per tablespoon). These are standard figures used in nutrition tracking.
The formula is simple: Calories = (weight in grams / 100) × calories per 100g + added fat calories. The same logic applies to protein, carbs, and fiber.
Worked Examples
Example 1: You eat a 50-gram slice of cooked collard greens with no added fat. Base calories = (50/100) × 35 = 17.5 kcal. Protein = 1.35 g, carbs = 2.8 g, fiber = 1.4 g.
Example 2: You have a 30-gram raw collard leaf and drizzle it with 1 teaspoon of olive oil (about 4.5 g). Base calories = (30/100) × 32 = 9.6 kcal. Added fat calories = 4.5 × 8.8 = 39.6 kcal. Total = 49.2 kcal.
Example 3: A 100-gram portion of frozen collards (about 3.5 oz) with 1 tablespoon of butter (13.5 g). Base calories = 30 kcal. Added fat = 13.5 × 7.2 = 97.2 kcal. Total = 127.2 kcal.
Tips & Best Practices
- Weigh your collards raw if possible, then cook them. This gives the most accurate base calorie count.
- If you're tracking macros, remember that collard greens are low in calories but high in fiber — a great choice for volume eating.
- Be mindful of added fats. A tablespoon of oil can add more calories than the greens themselves.
- For meal prep, cook a large batch and weigh individual portions after cooking to get consistent serving sizes.
Factors Affecting Accuracy
The calorie values are based on USDA standard references and can vary slightly depending on the specific variety of collard greens, growing conditions, and cooking method. Boiling can leach some water-soluble vitamins but doesn't significantly change calorie content. Adding salt or other seasonings (without fat) has negligible calorie impact.
If you're using a food scale, remember that 1 ounce equals 28.35 grams. The calculator handles this conversion automatically when you select ounces.
Frequently Asked Questions
How many calories are in one collard green leaf? A single raw leaf typically weighs 20–40 grams, so it contains roughly 6–13 calories. Cooked leaves are more concentrated, so a 30-gram cooked portion might have about 10 calories.
Are collard greens good for weight loss? Yes. They are very low in calories and high in fiber, which helps you feel full. A 100-gram serving of cooked collards has only about 35 calories.
Does cooking change the calorie count? Cooking removes water, so the same weight of cooked greens has slightly more calories per gram than raw. But the total calories in a given amount of greens remain similar.
What about canned collards? Canned collards may have added sodium and sometimes sugar or fat. Check the label for accurate values, as they can differ from fresh or frozen.
Additional Resources
For more detailed nutrition data, you can refer to the USDA FoodData Central database, which provides comprehensive nutrient profiles for collard greens and thousands of other foods. If you're tracking your overall diet, you might also find our calorie surplus calculator useful for planning your energy balance.