Fennel is a crisp, mildly anise-flavored vegetable that shows up in salads, roasted dishes, soups, and even as a crunchy snack. Whether you are tracking calories for weight loss, building a meal plan, or simply curious about a portion, this fennel calories per serving calculator gives you a fast, reliable estimate based on the amount you actually eat.
The tool covers two popular forms: raw fennel bulb and dried fennel seeds. Enter a quantity in grams, ounces, cups, or common kitchen measures, and it returns calories plus a full macronutrient breakdown — carbohydrates, protein, fat, and fiber. A servings control lets you scale a recipe or snack batch instantly.
Nutrition values are based on USDA FoodData Central standard references, so you can trust the numbers for everyday diet planning.
🧮 Fennel Calorie Calculator
Get calories and macros for fennel bulb or seeds.
How to Use This Tool
Start by choosing which form of fennel you are eating: raw bulb or dried seeds. The bulb is the crunchy base used in salads, roasts, and sautés; seeds are a spice used in teas, rubs, and baked goods. Then enter the amount you plan to eat and select the matching unit. For a recipe that makes several portions, enter the number of servings in the servings field and the calculator will scale the totals for you.
- Select Raw fennel bulb or Dried fennel seeds.
- Enter a number in the amount box (for example, 150 or 1).
- Choose the unit from the dropdown — grams, ounces, cups, bulbs, teaspoons, or tablespoons.
- Optionally set the serving count or batch size.
- Press Calculate to see calories and macros for the portion, plus the scaled amount for multiple servings.
How the Estimates Are Calculated
This calculator converts your chosen portion to grams, then multiplies by the standard calorie and nutrient values per 100 grams. The conversion factors come from typical portion weights and published food databases.
Macronutrients are calculated with the same proportion: grams of carbs, protein, fat, and fiber in your portion equal (portion grams ÷ 100) × nutrient value per 100 g. Because fiber contributes no usable energy in the same way as sugars and starches, the calorie figure from the USDA is used directly rather than summing 4-4-9 macro calories.
Reference Nutrition Values (per 100 g)
| Form | Energy | Carbs | Protein | Fat | Fiber |
|---|---|---|---|---|---|
| Fennel bulb, raw | 31 kcal | 7.3 g | 1.24 g | 0.20 g | 3.1 g |
| Fennel seeds, dried | 345 kcal | 42.4 g | 15.8 g | 14.87 g | 39.8 g |
Values are approximate and can vary slightly by variety, growing conditions, and moisture content. Most calorie databases round the bulb to 27–34 kcal per 100 g; 31 kcal is a widely used mid-range figure. The nutrient estimates are based on USDA FoodData Central.
Worked Examples
Example 1 — Bulb, by cup: A recipe calls for 1 cup of sliced fennel. The calculator converts 1 cup to 87 g, then computes (87 ÷ 100) × 31 = 27 kcal. It also shows 6.4 g carbs, 1.1 g protein, 0.2 g fat, and 2.7 g fiber.
Example 3 — Scaling a batch: If you roast 300 g of fennel bulb for a side dish and serve it to 4 people, each portion gets 75 g. That is about 23 kcal per serving, before any oil or butter is added.
Portion-Making Tips for Accurate Tracking
- Weigh the bulb trimmed and ready-to-eat, not the whole head with the stalks and root end.
- If a recipe includes olive oil, cheese, or dressing, track those separately — they can add more calories than the fennel itself.
- Fennel seeds are concentrated: a small tablespoon of seeds has more calories than a whole cup of sliced bulb. Be precise with spoon measurements.
- When logging in an app, choose 'fennel bulb raw' rather than 'cooked fennel' if you are measuring raw, and adjust the cooking method afterward if necessary.
Frequently Asked Questions
Is fennel low in calories? Yes. Raw fennel bulb is very low in calories — roughly 31 kcal per 100 g or about 27 kcal per cup of sliced pieces. It is also a good source of fiber, vitamin C, and potassium.
Are fennel seeds the same as fennel bulb nutritionally? No. Dried seeds are much more calorie-dense because they are dry and concentrated. A 100 g serving of seeds supplies about 345 kcal, while the same weight of raw bulb supplies only 31 kcal. To compare by typical portions, 1 cup of sliced bulb has about 27 kcal, and 1 tablespoon of seeds has about 22 kcal.
How accurate is this calculator? It uses standard USDA-derived nutrient values and typical portion weights, so it is accurate enough for everyday diet planning. Exact values can vary slightly between fresh produce batches, storage conditions, and brands of dried seeds, but differences are generally small at normal serving sizes.