Cauliflower is a low-calorie, versatile vegetable that often gets praised for its carbohydrates and fiber, but it also contributes a modest amount of protein for a non-starchy vegetable. A 100-gram serving of raw cauliflower contains about 1.9 grams of protein. That may not sound like much, but it adds up quickly across a large roasted tray, a half-head portion, or a full tray of cauliflower rice stir-fry.
This calculator is made for anyone tracking macros, planning plant-based meals, or simply trying to understand how much protein different portions actually provide. Instead of guessing, you can enter your serving size in grams, ounces, pounds, or cups, choose whether your cauliflower is raw, boiled, or frozen, and instantly get the protein content.
The result shows total protein, protein per 100 grams, and the percentage of the daily reference protein intake, making it easy to fit cauliflower into your overall nutrition plan. Whether you are using a food scale at home or estimating from a recipe, this tool gives you a quick, practical answer.
🥦 Serving Size & Form
How to Use This Calculator
Enter the amount of cauliflower you plan to eat in the number box, choose the unit that matches your recipe or food scale, and select the prepared form from the dropdown. If you are working from a recipe that calls for cups, select “cups,” and the calculator applies the typical weight of chopped raw or boiled cauliflower per cup. Press Calculate Protein, and the result area will show the total protein, the protein per 100 g, and the percentage of the daily reference protein intake (50 g).
The preset buttons are handy shortcuts: 100 g is a common nutrition label serving, 150 g is a generous side portion, 1 cup approximates a standard measuring-cup serving, and half a head covers a typical roasted half-cauliflower. You can still manually type any amount, including fractions like 0.75 or 2.5 cups.
Protein Content by Preparation
Cauliflower’s protein content changes slightly depending on how it is prepared, mainly because water absorption dilutes or concentrates nutrients. The values below are based on USDA data rounded to two decimals.
| Preparation | Protein per 100 g | Notes |
|---|---|---|
| Raw | 1.92 g | Reference form; highest protein density by weight |
| Boiled (drained) | 1.84 g | Water absorbed during cooking slightly lowers density |
| Frozen | 1.86 g | Similar to raw, but moisture content varies by brand |
These differences are small, but they matter if you weigh food cooked vs. raw. If you log before cooking, use raw values; if you weigh after boiling, use boiled values.
Formula Behind the Numbers
The calculator uses a simple proportion: protein = (weight in grams / 100) × protein per 100 g.
First, your chosen unit is converted to grams. The conversion factors are 28.35 g per ounce and 453.6 g per pound. For cups, the calculator applies about 107 g per cup for raw chopped cauliflower, 124 g per cup for boiled, and 100 g per cup for frozen — these are average densities for standard chopped pieces. Then the protein factor for the selected form is applied.
Worked Examples
Example 1: Raw florets — You eat 150 g of raw cauliflower. Protein = (150 / 100) × 1.92 = 2.88 g. That is about 5.8% of a 50 g protein target.
Example 2: Boiled cauliflower cups — You have 2 cups of boiled cauliflower. First convert: 2 × 124 g = 248 g. Then protein = (248 / 100) × 1.84 = 4.56 g.
Example 3: Half a head — If half a head weighs 450 g raw, protein = (450 / 100) × 1.92 = 8.64 g. Add cheese sauce, tahini, or chickpeas to turn that into a more protein-dense meal.
Factors Affecting Accuracy
Every cauliflower head is slightly different. Growing conditions, variety, storage time, and how finely you chop it all affect moisture content, which shifts protein per gram. The values here are accepted averages from food databases, not a guarantee for your exact batch.
Weighing is the most reliable method. Cup measures are convenient but less precise because chopped floret size changes how tightly pieces pack. For macro tracking, use a kitchen scale and log the raw weight when possible. Cooking method also matters: steaming and boiling add water; roasting removes moisture and can increase protein density per 100 g, though the total protein in the cauliflower itself stays the same. For a broader comparison across vegetables, you can also use the vegetable nutrition calculator.
Frequently Asked Questions
Is cauliflower a good source of protein? Not by itself — it is low to moderate protein, but it is a meaningful contributor in a varied plant-based diet. Combined with legumes, nuts, seeds, or dairy, it adds variety without many calories. If you are looking for more concentrated plant protein, try the chickpea protein calculator.
Should I log cauliflower raw or cooked? Weigh raw when the label or recipe references raw. If you already cooked it, use boiled values with cooked weight. The total protein is nearly identical, so do not stress over a 0.08 g difference.
Where does the data come from? Protein values are based on USDA FoodData Central standard reference entries for raw and boiled cauliflower. You can explore the full nutrient profiles at USDA FoodData Central. General cauliflower nutrition background is also on Wikipedia.