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Ground Flaxseed Calories and Nutrition Facts

Ground Flaxseed has 545 calories per 100 g, with 18 g protein, 34.4 g carbs and 37.3 g fat. Official USDA analytical record: Flaxseed, ground (FDC ID: 2262075).

⚡ Quick Nutrition Answer

A 100g serving of ground flaxseed contains 545 calories, 18g protein, 34.4g total carbs (11.3g net carbs), and 37.3g fat.

Energy density

5.45 kcal/g

high

Protein / 100 kcal

3.3 g

satiety per calorie

Net carbs / 100 g

11.3 g

carbs minus fibre

100 kcal portion

18 g

≈ 0.6 oz

✓ High protein✓ High fibre✓ Low sodium✓ Sugar free
Serving size
How many?

= 100 g total

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Calories
545
in 100 g · 545 kcal per 100 g
Carbs34.4 g · 25%
Protein18 g · 13%
Fat37.3 g · 62%
Sugars
0g
Fibre
23.1g
Saturated fat
3.3g
Sodium
37mg

Flaxseed, ground nutrition facts

The table below shows the complete nutritional profile for flaxseed, ground per 100 g (the laboratory analytical standard), alongside the share of the FDA Daily Value each nutrient covers. Most of its calories come from fat, and it is high in protein (18 g per 100 g), a good source of fibre.

NutrientPer 100 g% DV*
Calories545 kcal
Protein18 g36%
Carbohydrate34.4 g13%
Fat37.3 g48%
Sugars0 g
Fibre23.1 g83%
Saturated fat3.3 g16%
Sodium37 mg2%

*Percent Daily Value per 100 g, against the FDA reference intakes for adults and children 4+ years (50 g protein, 275 g carbohydrate, 28 g fibre, 78 g fat, 20 g saturated fat, 2300 mg sodium). Total sugars has no Daily Value — the 50 g reference applies to added sugars only, and USDA reports total sugars here.

Ground Flaxseed calories by weight: ounces, pounds and grams

USDA publishes this food per 100 g, so here is the same profile converted to the weights a kitchen scale and a US recipe actually use. At 5.45 kcal per gram (high energy density), energy dense: small portions carry a lot of calories, so measuring rather than eyeballing makes a real difference.

AmountCaloriesProteinCarbsFat
1 oz (28 g)155 kcal5.1 g9.8 g10.6 g
100 g (3.5 oz)545 kcal18 g34.4 g37.3 g
4 oz (113 g)618 kcal20.4 g39 g42.3 g
8 oz / ½ lb (227 g)1236 kcal40.8 g78 g84.6 g
1 lb (454 g)2472 kcal81.6 g156 g169.2 g
🏛️ Official USDA FoodData Central CitationFDC ID: 2262075

Data sourced from USDA FoodData Central Foundation Foods dataset (public domain, CC0). Laboratory food profile and analytical measurements verified under USDA FDC ID 2262075.

View raw USDA laboratory entry →

How ground flaxseed compares to other nuts & seeds

Against the 19 nuts & seeds in this database, ground flaxseed ranks 3rd lowest in calories and 10th highest in protein. The category averages 616 kcal per 100 g, so this one is 12% below it. The lightest option in the category is flour, chestnut at 385 kcal per 100 g, and the protein leader is seeds, pumpkin seeds (pepitas), raw at 29.9 g per 100 g.

Nuts & Seeds (by calories)CaloriesProteinkcal/g
🥜 Flour, chestnut385 kcal5.3 g3.85
🥥 Flour, coconut438 kcal16.1 g4.38
🍽️ Flaxseed, ground (this page)545 kcal18 g5.45
🍽️ Seeds, pumpkin seeds (pepitas), raw555 kcal29.9 g5.55
🥜 Nuts, cashew nuts, raw565 kcal17.4 g5.65

Portion planning with ground flaxseed

  • 100 calories comes to about 18 g (0.6 oz).
  • 20 g of protein takes about 111 g, bringing 605 kcal with it — that is 3.3 g of protein per 100 calories.
  • Fibre density is 4.2 g per 100 calories, covering 83% of the daily fibre target per 100 g.
  • Macro split by calories: 25% carbs, 13% protein, 62% fat.

Nutrient screening detail

The badges near the top of this page come from screening the per-100 g values against the FDA nutrient-content thresholds in 21 CFR 101.54–101.62. The regulations define those claims per reference serving rather than per 100 g, so treat these as a like-for-like comparison between foods, not as a statement about a product label:

  • High protein — 18 g per 100 g (≥ 20% DV)
  • High fibre — 23.1 g per 100 g (≥ 20% DV)
  • Low sodium — 37 mg per 100 g (≤ 140 mg)
  • Sugar free — 0 g total sugars per 100 g (< 0.5 g)

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Ground Flaxseed FAQ & Nutrition Questions

How many calories and carbs are in 100 g of ground flaxseed?

One serving of 100 g provides 545 calories, 34.4 g total carbs (11.3 g net carbs), 18 g protein, and 37.3 g fat.

How many calories are in 100 g of ground flaxseed?

Ground Flaxseed contains 545 calories per 100 g, with 18 g protein, 34.4 g carbohydrate, and 37.3 g fat. Use the interactive calculator above to scale to any custom amount.

What is the USDA FoodData Central (FDC) ID for ground flaxseed?

The official USDA FoodData Central ID for "Flaxseed, ground" is FDC ID: 2262075. You can view the verified laboratory analytical record on the USDA FoodData Central Database.

What is the macronutrient breakdown of ground flaxseed?

By calories, ground flaxseed is approximately 25% carbohydrates, 13% protein, and 62% fat.

How many calories are in an ounce of ground flaxseed?

One ounce (28 g) of ground flaxseed has 155 calories, with 5.1 g protein, 9.8 g carbs and 10.6 g fat. Four ounces (113 g) comes to 618 calories, and a full pound (454 g) to 2472 calories.

How much ground flaxseed is 100 calories?

About 18 g of ground flaxseed supplies 100 calories, because it carries 5.45 kcal per gram (high energy density). Energy dense: small portions carry a lot of calories, so measuring rather than eyeballing makes a real difference.

How much ground flaxseed do I need for 20 g of protein?

Roughly 111 g of ground flaxseed, which also brings 605 calories with it. That works out to 3.3 g of protein per 100 calories.

How many net carbs are in ground flaxseed?

Per 100 g, ground flaxseed has 11.3 g net carbs — 34.4 g total carbohydrate minus 23.1 g fibre.

Is ground flaxseed high or low in calories for a nuts & seed?

Ground Flaxseed sits 12% below the nuts & seeds average of 616 kcal per 100 g, ranking 3rd lowest of 19 in this category.

Is this nutrition data free to use?

Yes. The data is sourced directly from USDA FoodData Central (CC0 public domain). Viewing and scaling portions here is 100% free with no sign-up — and you can log this food free in our online food diary.