QUICK ANSWER
How many calories are in fennel?
For raw fennel bulb, the selected reference is 26.9 kcal per 100 g. Scale that value to the edible portion and keep other preparations separate.
26.9 kcal / 100 gNutrition values describe a reference food state, not every individual item. Variety, water content, preparation and portion weight can change the estimate.
THE NUMBERS
Fennel nutrition facts per 100 g
The values below use the reference state shown at the top of this page. Keeping one gram basis makes it easier to compare foods before translating the values to the portion you actually ate.
- Calories
- 26.9 kcal
- Protein
- 0.922 g
- Carbohydrate
- 5.49 g
- Fat
- 0.14 g
- Fibre
- 2.05 g
- Potassium
- 332 mg
- Calcium
- 41.3 mg
- Vitamin C
- 14.7 mg
Source: USDA FoodData Central Foundation record 2747655. Values may be rounded for readability.
SERVING SIZE
Calories by portion and serving weight
Words such as “small,” “medium,” “half” and “one piece” are convenient but imprecise. Grams make the estimate reproducible, particularly when natural foods vary in size.
MACROS
Carbohydrate, protein and fat explained
Protein
0.922 g per 100 g. From Fennel, bulb, raw.
Carbohydrate
5.49 g per 100 g. From Fennel, bulb, raw.
Fat
0.14 g per 100 g. From Fennel, bulb, raw.
MORE THAN CALORIES
Fibre, vitamins and minerals
One food does not need to provide every nutrient. These are the characteristics most useful for understanding where fennel fits in a varied eating pattern.
Potassium
332 mg per 100 g in the selected USDA record.
Calcium
41.3 mg per 100 g in the selected USDA record.
Vitamin C
14.7 mg per 100 g in the selected USDA record.
Folate
37 µg per 100 g in the selected USDA record.
FOOD STATE MATTERS
How preparation changes the nutrition estimate
A reliable calorie entry should describe the food you actually ate—not merely a food with a similar name.
Raw bulb
Selected and only mapped fennel state.
Cooked bulb
Not represented by the selected record; source a cooked record.
Fennel fronds
Not represented by the bulb record.
Fennel seed
A different food form and not part of this raw-bulb entry.
PRACTICAL CONTEXT
How fennel can fit different goals
There is no universal “good” or “bad” food. Portion, frequency, the rest of the meal, preferences and individual health needs all matter.
Portion math
26.9 kcal per 100 g becomes 13.4 kcal for the 50 g example.
Fibre check
The selected record lists 2.05 g fibre per 100 g.
Protein check
The selected record lists 0.922 g protein per 100 g.
Best logging move
Weigh the trimmed bulb portion and add dressing or cooking oil separately.
QUALITY & SAFETY
How to choose, store and prepare it
Store
Keep the bulb dry and chilled.
After opening or cutting
Cover cut fennel in a clean container.
Prepare
Rinse the bulb and between layers before eating or cooking.
Check before eating
Discard fennel with mould, strong off-odour or widespread slimy decay.
PHOTO LOGGING
How to log fennel more accurately
A food photo can suggest the ingredient, but it cannot always reveal exact weight, hidden oil or preparation details. These checks turn an image guess into a better estimate.
- 01
Match the exact reference state: Fennel, bulb, raw.
- 02
Use edible grams. Calories are scaled from the selected per-100-g record; named portions use weights stored in that same local USDA record.
- 03
Log oil, sauce, sweetener, salt and recipe ingredients separately.
- 04
Use a separate record when preparation changes the food state.
COMMON QUESTIONS
Fennel calorie and nutrition questions
How many calories are in 100 g of fennel?
26.9 kcal in the selected Fennel, bulb, raw record.
How much fibre is in fennel?
2.05 g per 100 g in the selected record.
Which fennel entry does this page use?
Fennel, bulb, raw. The preparation and edible state are part of the answer.
Are fennel seeds included on this page?
No. The selected record is fennel bulb, raw; seeds need a separate food entry.
How are the portion calories calculated?
Each portion is scaled from 26.9 kcal per 100 g. Named portion weights come from the selected source record.
KEEP EXPLORING
Related food guides
SOURCES & METHOD
Where these numbers come from
Fennel, bulb, raw, per 100 g edible portion. Numeric nutrition and portion claims use the selected local USDA record. Preparation notes cover the common USDA forms of this food; log added ingredients separately.
Open USDA FoodData Central Foundation record 2747655 ↗Page reviewed 26 August 2026. We show the food state, gram basis and source record so readers can check the estimate instead of treating one number as universally exact.