Fennel is a crisp, aromatic vegetable prized for its mild licorice flavor and impressive nutritional profile. Whether you're tracking macronutrients for weight management, meal prepping, or following a specific diet plan, knowing the exact fat content in your fennel servings is essential. This calculator helps you determine the total fat, saturated fat, and calories from fat in any portion of raw fennel bulb — by weight (grams or ounces) or by common volume measures like cups (sliced or chopped).
Fennel is naturally very low in fat, making it a popular choice for low-fat and heart-healthy diets. Our tool uses USDA-standard values to give you accurate, instant results. Perfect for nutritionists, dietitians, fitness enthusiasts, and anyone curious about the fine details of their food. Use it alongside other nutrition calculators to build a complete picture of your daily intake.
🧮 Fennel Fat Calculator
How to Use This Tool
Using the Fennel Fat Calculator is straightforward. Enter the amount of fennel you plan to eat — either by weight (grams or ounces) or by volume (cups sliced or chopped). The calculator instantly returns the total fat, saturated fat, and calories derived from fat. You can use the quick-fill buttons for common serving sizes: 100 g, 1 cup sliced, 1 cup chopped, or 150 g (roughly one medium bulb). After calculating, the result area shows a clear breakdown. Use the reset button to clear and start a new calculation.
Formula Explained
The calculation is based on USDA National Nutrient Database values for raw fennel bulb (Foeniculum vulgare). Per 100 grams, raw fennel contains approximately 0.2 g of total fat and 0.1 g of saturated fat. The tool converts your input to grams (using standard conversions: 1 oz = 28.3495 g; 1 cup sliced or chopped fennel ≈ 87 g), then applies the formula:
Total Fat (g) = (grams of fennel / 100) × 0.2
Saturated Fat (g) = (grams of fennel / 100) × 0.1
Calories from Fat = Total Fat (g) × 9 kcal/g
This method ensures accuracy for any portion size. Note that fat content can vary slightly between fresh and stored fennel, but the USDA values are a reliable standard for most dietary tracking.
Worked Examples
Example 1: You eat 1 cup of sliced fennel (87 g). Total fat = (87/100) × 0.2 = 0.174 g. Saturated fat = (87/100) × 0.1 = 0.087 g. Calories from fat = 0.174 × 9 = 1.6 kcal.
Example 2: You have a 150 g fennel bulb. Total fat = (150/100) × 0.2 = 0.3 g. Saturated fat = 0.15 g. Calories from fat = 2.7 kcal.
Example 3: A recipe calls for 4 oz (113.4 g) of fennel. Total fat = (113.4/100) × 0.2 = 0.227 g. Saturated fat = 0.113 g. Calories from fat = 2.0 kcal.
Tips & Best Practices
For the most accurate tracking, weigh your fennel on a kitchen scale rather than relying on volume estimates. Chopped fennel can pack differently depending on how finely it's cut, which affects the gram weight per cup. If you're following a very low-fat diet (e.g., under 20 g fat per day), even the tiny amount in fennel can be worth logging. Remember that fennel's fat content is negligible compared to oils, nuts, or fatty meats, so it's an excellent addition to low-fat meal plans. Pair this calculator with other nutrition tools like the Fennel Calorie Calculator to get a complete macronutrient picture.
Frequently Asked Questions
Is fennel fat-free? No, but it is extremely low in fat — about 0.2 g per 100 g. It is considered a very low-fat food and is suitable for virtually any diet.
Does cooking fennel change its fat content? Cooking does not significantly alter the fat content, though adding oil or butter during cooking will increase the total fat. This calculator is for raw fennel only.
Can I use this for fennel seeds? No. Fennel seeds have a much higher fat content (around 15-18 g per 100 g) and are not covered by this tool. Use a separate nutrition database for seeds.
Why does the saturated fat value show three decimal places? Because the amounts are very small (often under 0.1 g), three decimal places provide meaningful precision for dietary tracking.
Standard Values & Reference Data
| Measurement | Approximate Weight (g) | Total Fat (g) | Saturated Fat (g) |
|---|---|---|---|
| 100 g (3.5 oz) | 100 | 0.20 | 0.100 |
| 1 cup sliced | 87 | 0.17 | 0.087 |
| 1 cup chopped | 87 | 0.17 | 0.087 |
| 1 medium bulb (150 g) | 150 | 0.30 | 0.150 |
| 1 oz | 28.35 | 0.06 | 0.028 |
Data source: USDA FoodData Central. For more detailed nutritional information, visit the USDA FoodData Central website.