Flaxseed: Nutrition Facts
Flaxseed is the seed of the flax plant, Linum usitatissimum. The per-100g values below include fiber and the plant-source omega-3 fatty acid alpha-linolenic acid (a portion of the fat figure). The figures here are for whole dried seeds, USDA standard reference; ground flaxseed has similar per-gram values.
| Energy (kcal) | Protein (g) | Carb (g) | Fiber (g) | Fat (g) |
|---|---|---|---|---|
| 534 | 18.3 | 28.9 | 27.3 | 42.2 |
Percent Daily Value by serving
| Serving | Energy (kcal) | Protein (g) | Carb (g) | Fiber (g) | Fat (g) |
|---|---|---|---|---|---|
| 100 g | 534 (27%) | 18.3 (37%) | 28.9 (11%) | 27.3 (98%) | 42.2 (54%) |
| 1 tablespoon ground (~7 g) | 37 (2%) | 1.3 (3%) | 2.0 (1%) | 1.9 (7%) | 3.0 (4%) |
| 1 tablespoon whole (~10 g) | 55 (3%) | 1.9 (4%) | 3.0 (1%) | 2.8 (10%) | 4.3 (6%) |
| 1 cup whole (~168 g) | 897 (45%) | 30.7 (61%) | 48.5 (18%) | 45.9 (164%) | 70.8 (91%) |
Percent Daily Value shows how much a nutrient in one serving contributes to a daily diet, based on the United States Food and Drug Administration reference intake of 2,000 calories a day. The FDA notes that 2,000 calories a day is used for general nutrition advice and that individual needs vary. The values below are calculated from the USDA macros for this food. FDA Daily Value on the Nutrition and Supplement Facts Labels (21 CFR 101.9), accessed 2026-06-05.
| Serving | Amount | % Daily Value |
|---|---|---|
| Energy (kcal) | 534 | 27% |
| Protein (g) | 18.3 | 37% |
| Carb (g) | 28.9 | 11% |
| Fiber (g) | 27.3 | 98% |
| Fat (g) | 42.2 | 54% |
How much protein in Flaxseed?
Flaxseed, dried, contains 18.3 g of protein per 100 g, per the USDA FoodData Central entry cited below. A typical 1 tablespoon ground (~7 g) serving therefore provides about 1.3 g of protein.
How many calories in Flaxseed?
Flaxseed, dried, supplies about 534 kcal per 100 g. A 1 tablespoon ground (~7 g) serving works out to roughly 37 kcal.
Common serving sizes
- 1 tablespoon ground (~7 g): 37 kcal, 1.3 g protein, 3.0 g fat
- 1 tablespoon whole (~10 g): 55 kcal, 1.9 g protein, 4.3 g fat
- 1 cup whole (~168 g): 897 kcal, 30.7 g protein, 70.8 g fat
Source: USDA FoodData Central, fdcId 169414, accessed 2026-05-28
References
- Seeds, flaxseed - USDA FoodData Central. USDA FoodData Central. Accessed 2026-05-28.
Last reviewed: 2026-05-28