Collard greens are one of the most nutrition-packed leafy vegetables, yet their calorie count varies a lot depending on whether they are raw, boiled, cooked from frozen, or dressed with oil and butter. This free calculator converts cups of collard greens into calories plus the key macros — protein, carbohydrates, fiber, and fat — so you can log meals quickly and accurately.
Built for meal prep, Southern-style sides, green smoothies, and everyday calorie tracking, it handles both US and metric cup sizes, adjusts for raw versus cooked density, and even lets you add a teaspoon of olive oil or butter when your recipe includes it. Nutrition values follow standard USDA reference data, with cup weights estimated for chopped leaves.
Use the preset buttons for common portions or type any number of cups. The step-by-step breakdown shows the math behind every total.
🥬 Collard Greens Calorie Calculator
Estimate calories and macros for collard greens served by the cup — raw or cooked, with optional oil or butter.
📊 Your Results
- Choose preparation and cup size.
- Calculate total grams.
- Multiply per-100g values by grams/100.
How to Use This Tool
Choose the preparation method that matches what you are eating — raw chopped leaves, boiled collards, or frozen collards that have been boiled — then enter the number of cups. The amount can be a decimal such as 0.75 for three-quarters of a cup. If you cooked your greens with added fat, tick the olive oil or butter box and the calculator folds those calories and grams of fat into the total.
The cup size selector matters: a US legal cup is 240 ml while a metric cup is 250 ml, a difference of about 4% that becomes noticeable over large batches. Weight estimates assume chopped leaves loosely packed into the cup, the way most people measure greens at home.
How It Works
The calculator multiplies the weight of collard greens in your portion by nutrition-per-100-gram values drawn from the U.S. Department of Agriculture's FoodData Central database, the standard reference used by nutrition researchers and dietitians.
Weight per cup depends on preparation. Raw chopped leaves are light and airy — about 36 g per cup — while boiled collards pack in much more because the leaves wilt and absorb water, reaching about 190 g per cup. That is why a cup of boiled collards and a cup of raw collards have very different calorie counts even though their per-100-gram values are similar.
Reference: USDA FoodData Central · Collard greens on Wikipedia.
Standard Values
| Preparation | Weight per US cup | kcal per 100 g | kcal per cup |
|---|---|---|---|
| Raw, chopped | 36 g | 32 kcal | ≈ 12 kcal |
| Boiled, drained | 190 g | 33 kcal | ≈ 63 kcal |
| Frozen, boiled | 185 g | 30 kcal | ≈ 56 kcal |
These are typical figures for collards cooked without added fat. Seasoning, broth, bacon, or ham hock will raise the total.
Worked Example
You eat 1.5 metric cups of boiled collards with a teaspoon of olive oil poured on top.
- Weight: 1.5 × 190 g × 250/240 ≈ 297 g
- Greens only: 33 kcal/100 g × 297 g / 100 ≈ 98 kcal
- Olive oil: +40 kcal
- Final total: ≈ 138 kcal
Frequently Asked Questions
Why does a cup of raw collards have so few calories? Raw leaves are mostly air and water — only about 36 g of plant material fits in a cup. Once cooked, the leaves collapse and a cup holds roughly five times more collard by weight.
Are these numbers exact? No. Cup weights vary with chop size and packing pressure, and farm-to-farm nutrient differences mean even lab-tested values are estimates. The tool is accurate enough for meal logging and portion awareness but not for medical or clinical decisions.
Should I count the oil? Yes. A teaspoon of olive oil adds about 40 kcal and 4.5 g of fat, and butter adds about 34 kcal and 3.8 g of fat. If your greens are cooked with bacon drippings, ham hock, or a creamy sauce, those calories are not included in the plain-vegetable figures.
Tips & Best Practices
For the most reliable logs, weigh your collards on a kitchen scale at least once and compare that weight to the grams total shown by the calculator — it takes just one measurement to calibrate your cup estimates for good. Remember that the nutrition panel on frozen packages reflects the weight of the frozen or prepared product, so check whether the package lists values per 100 g or per cup.
For broader vegetable guidance, see the USDA's MyPlate vegetables page.