QUICK ANSWER
How many calories are in flaxseed?
The selected generic-flaxseed record provides 534 kcal per 100 g. Scale from the edible amount and keep other states separate.
534 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
Flaxseed 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
- 534 kcal
- Protein
- 18.3 g
- Carbohydrate
- 28.9 g
- Fat
- 42.2 g
- Fibre
- 27.3 g
- Thiamin
- 1.64 mg
- Magnesium
- 392 mg
- Phosphorus
- 642 mg
Source: USDA FoodData Central SR Legacy record 169414. 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
18.3 g per 100 g. From Seeds, flaxseed.
Carbohydrate
28.9 g per 100 g. From Seeds, flaxseed.
Fat
42.2 g per 100 g. From Seeds, flaxseed.
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 flaxseed fits in a varied eating pattern.
Thiamin
1.64 mg per 100 g in the selected USDA record.
Magnesium
392 mg per 100 g in the selected USDA record.
Phosphorus
642 mg per 100 g in the selected USDA record.
Manganese
2.48 mg 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.
Whole seed
Included in the selected record's portions.
Ground seed
Included in the selected record's portions.
Flax oil
Use the oil record; fibre is not interchangeable.
Baked recipe
Log the complete recipe and yield.
PRACTICAL CONTEXT
How flaxseed 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
At 534 kcal per 100 g, the 7 g example is 37.4 kcal.
Fibre check
The selected record lists 27.3 g fibre per 100 g.
Protein check
The selected record lists 18.3 g protein per 100 g.
Best logging move
Specify whole or ground measure, weigh when possible, and keep flax oil separate.
QUALITY & SAFETY
How to choose, store and prepare it
Store
Keep flaxseed sealed away from heat, light and moisture.
After opening or cutting
Follow package storage directions after grinding or opening.
Prepare
Use clean, dry utensils and observe package allergen statements.
Safety boundary
Discard mouldy or unmistakably rancid seed; this nutrient record sets no storage duration.
PHOTO LOGGING
How to log flaxseed 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: Seeds, flaxseed.
- 02
Use edible grams. Calories are scaled from the selected per-100-g record; named portion weights come from the same local USDA record, while explicitly labelled gram examples are calculated.
- 03
Log oil, sauce, sweetener, salt and recipe ingredients separately.
- 04
Use a separate record when preparation changes the food state.
COMMON QUESTIONS
Flaxseed calorie and nutrition questions
How many calories are in 100 g of flaxseed?
534 kcal in the selected Seeds, flaxseed record.
How much fibre is in flaxseed?
27.3 g per 100 g in the selected record.
Which flaxseed state does this page use?
Seeds, flaxseed. State and preparation are part of the answer.
Are whole and ground measures both available?
Yes. The selected source supplies separate weights for whole and ground teaspoon and tablespoon measures.
How are the portion calories calculated?
Each portion is scaled from 534 kcal per 100 g. Named weights come from the selected source record; calculated gram examples are labelled.
KEEP EXPLORING
Related food guides
SOURCES & METHOD
Where these numbers come from
Seeds, flaxseed, per 100 g edible portion. Numeric nutrition claims use the nutrition-reviewed local USDA record. Named portion claims use source-held weights; explicitly labelled gram examples are calculations from the per-100-g record. The nutrient record does not establish storage duration, clinical advice or food-safety limits; use package directions and current authoritative guidance where relevant.
Open USDA FoodData Central SR Legacy record 169414 ↗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.