Broccoli is one of the lowest-glycemic vegetables you can add to a plate, but low glycemic index does not tell the whole story — portion size determines how much carbohydrate actually reaches your bloodstream. This tool converts your serving size, the glycemic index of broccoli, and its carb content into a single glycemic load (GL) score, so you can see whether a snack-sized handful, a full cup, or a whole stalk fits your meal plan.
Whether you track macros, follow a low-carb or diabetic-friendly diet, or just want a more accurate nutrition estimate, the calculator uses the standard formula GL = (net carbs per serving × GI) ÷ 100. It also supports common units like cups, florets, grams, and stalks, and lets you switch between net and total carbohydrate values. No sign-up, no emails — just enter your portion and get an instant low / medium / high score with the math shown step by step.
Broccoli Glycemic Load Calculator
Estimate the glycemic load of any broccoli serving — from a handful of florets to a full stalk.
How the Glycemic Load Is Calculated
Glycemic load (GL) is a portion-adjusted measure of how much a food raises blood sugar. It is calculated from the glycemic index (GI) and the net carbohydrate in the serving you actually eat:
Net carbs are total carbohydrates minus fiber, because fiber is not digested into glucose. Raw and cooked broccoli both have a GI around 10, which is very low. Conventional GL cutoffs are below 10 for low, 11–19 for medium, and 20 or more for high, so broccoli rarely leaves the low range. The tool performs three simple steps: convert your serving to grams, estimate the net carbs in that portion, then apply the formula above.
Reference Values for Broccoli
The figures below are approximate and based on USDA FoodData Central values for cooked, boiled, drained broccoli without added fat or salt:
| Measure | Weight | Total carbs | Net carbs | GL (GI 10) |
|---|---|---|---|---|
| 100 g (about ⅔ cup) | 100 g | 7.2 g | 3.9 g | 0.4 |
| ½ cup chopped | 78 g | 5.6 g | 3.0 g | 0.3 |
| 1 cup chopped | 156 g | 11.2 g | 6.1 g | 0.6 |
| 1 medium stalk | ~220 g | 15.8 g | 8.6 g | 0.9 |
Carbohydrate values change slightly with growing conditions and cooking time, so treat them as reasonable estimates rather than laboratory measurements.
Step-by-Step Worked Example
Suppose you eat 1 cup of cooked chopped broccoli with a GI of 10 and 7 g of net carbs per 100 g.
1. Serving in grams: 1 cup = 156 g
2. Net carbs per serving: (156 ÷ 100) × 7 = 10.9 g
3. Glycemic load: (10.9 × 10) ÷ 100 = 1.1, which is low.
By comparison, a serving of white rice with the same 10.9 g of net carbs and a GI of 70 would have a GL of 7.6. Broccoli keeps the response small because both the GI and the carb density are low.
Tips for Accurate Entries
- Weigh broccoli in grams whenever you can. Volume measures like cups are convenient but vary with chop size and how tightly they are packed.
- Use net carbs for glycemic load. If your food label only lists total carbs and fiber, switch to Enter total carbs & fiber and the calculator will subtract fiber for you.
- Record the cooked weight if you are logging a meal. A cup of raw chopped broccoli weighs less than a cup of cooked chopped broccoli.
- Do not include added butter, oil, cheese, or sauces in the carb values. Those additions change the calorie and fat content, but the calculator only estimates the broccoli portion.
- For a conservative estimate, choose a GI of 15; for a typical value, keep GI at 10.
Frequently Asked Questions
Is broccoli a low-glycemic food? Yes. Most published GI values for broccoli are around 10, and the glycemic load is below 1 for a typical serving. This makes it an excellent vegetable for low-GI and diabetic meal plans.
Does cooking broccoli increase its carbs? Cooking does not add carbohydrate. It changes water content, so cooked broccoli is heavier per cup and concentrates the carbs slightly by weight. The calculator accounts for this if you use cooked weights and per-100 g values.
Can I use this calculator for other vegetables? You can adapt it by entering a different GI and carb value, but the built-in unit conversions are specific to broccoli. For other foods, check nutrition data from USDA FoodData Central and a GI value from the University of Sydney GI database.
Is glycemic load the same as glycemic index? No. GI measures how fast a food raises blood sugar compared with pure glucose, while GL also factors in how much carbohydrate is in the portion you eat. Two foods can have the same GI but very different GL values.
Do I need to count net carbs from broccoli? On most diabetes and low-carb plans, the few grams of carbs in broccoli are usually easy to fit into a daily budget. The glycemic load score helps you compare portions, so you can enjoy larger servings without guessing.