Seeds are one of the simplest ways to add dietary fiber to your day, but their fiber content is surprisingly uneven. Chia seeds and flaxseeds are fiber powerhouses, while hulled hemp seeds contain much less. This seed fiber per 100g calculator helps you see exactly what is in the amount you plan to eat — whether you are sprinkling sunflower seeds over a salad, baking with ground flax, or stirring chia into overnight oats.
Select a common seed preset or enter your own fiber value per 100g, add the weight you are using, and the tool instantly returns total fiber, the fiber density, and a clear step-by-step calculation. It supports grams and ounces, so recipes with either unit stay easy to check. Ideal for anyone tracking macros, working toward a daily fiber target, or comparing seeds before buying them.
🌱 Seed Fiber Per 100g Calculator
Pick a seed, enter the amount you ate, and get the fiber content instantly.
How to Use This Calculator
This tool is built for quick estimates that still respect real-world recipe amounts. Start by choosing the seed you are actually eating from the preset buttons, or type a custom fiber-per-100g value from the nutrition label. Then enter the amount in grams or ounces. Press Calculate fiber and you will see the total fiber, the fiber density, and the exact math that produced the result.
- Click a seed preset — Chia, Flaxseed, Sesame, Sunflower, Pumpkin, or Hemp. The fiber value fills in automatically.
- Adjust the fiber value if your package lists a different number.
- Enter the amount you are eating and choose the correct unit.
- Press the blue button and read your fiber total in grams.
If your seed is not in the preset list, look for the fiber value on the package or a trusted nutrition database, type it into the fiber field, and continue as usual. The same formula works for any seed or seed blend.
Why Fiber Content Varies So Much
Seeds are not interchangeable when it comes to fiber. A 30 g bowl of chia seeds delivers about 10 g of fiber, while the same weight of hulled hemp seeds gives just over 1 g. The difference comes down to seed structure. Whole seeds carry a fibrous outer coat that protects the embryo and stores energy, and that coat is largely insoluble fiber. Flaxseeds and chia seeds also produce soluble mucilage when soaked, which adds to their total fiber. When seeds are hulled, shelled, or processed, some of that fiber is removed, so the per-100g value drops sharply.
This is why comparing seeds by weight rather than by volume or by handful matters. A small two-tablespoon serving of one seed can be a meaningful fiber contribution, while the same serving of another is mostly protein and fat. Using a per-100g calculator keeps these differences visible and helps you plan portions honestly.
Fiber Values of Common Seeds
The table below lists approximate fiber values for common seeds as eaten. Values are based on typical USDA food data and may vary between brands, batches, and processing methods. When your package lists a fiber value, use that instead.
| Seed (as typically eaten) | Fiber per 100g |
|---|---|
| Chia seeds | 34.4 g |
| Flaxseed, whole | 27.3 g |
| Sesame seeds, whole | 11.8 g |
| Sunflower seed kernels, dried | 8.6 g |
| Pumpkin seed kernels | 6.0 g |
| Hemp seeds, hulled | 4.0 g |
If you are exploring other plant-based fiber sources for the same nutritional goal, you may also find the coconut fiber per 100g calculator useful as a comparison.
Worked Examples
Example 1: Chia seeds in oatmeal. You stir 2 tablespoons (28 g) of chia seeds into overnight oats. Total fiber = 34.4 × 28 ÷ 100 = 9.6 g. That is roughly one-third of a typical 25–30 g daily fiber target, which shows how quickly fiber-dense seeds add up.
Example 2: Hemp seeds in a smoothie. A 30 g handful of hulled hemp seeds provides only about 1.2 g of fiber because the hull is removed. If you assumed all seeds were equally high in fiber, you would overcount by a huge margin. This is exactly why checking the per-100g value matters.
Example 3: Sunflower seeds as a snack. A standard 1 oz (28 g) serving of sunflower seed kernels gives about 2.4 g of fiber. If you eat 2 oz, the calculator doubles the amount to 4.8 g, and you can see the step-by-step breakdown instantly.
Tips for Accurate Fiber Tracking
- Weigh seeds in grams instead of relying on volume measurements. A cup of whole seeds weighs very differently from a cup of ground seeds or a cup of seeds with shells.
- Check whether the seed is hulled. Hulled hemp, hulled sesame, and shelled pumpkin seeds are all lower in fiber than their whole counterparts.
- Ground seeds behave differently in recipes but retain their fiber. Ground flaxseed still contains the fiber from the original seed, so use the same per-100g value unless the label states otherwise.
- If you combine seeds with nuts, dried fruit, or granola, calculate each ingredient separately and then add the fiber totals.
- Increase fiber intake gradually and drink enough water to avoid digestive discomfort.
For a broader look at how seeds fit into your overall carbohydrate or calorie goals, pair this tool with the nutrition target calculator or a general carbohydrate tracking approach.
Frequently Asked Questions
Is dietary fiber counted as a carbohydrate?
Yes. Fiber is a type of carbohydrate that the body does not fully digest. It still contributes to total carbohydrate on a nutrition label, but it is often subtracted when people calculate net carbs. Fiber from seeds therefore counts toward your carb total while also supporting digestion and satiety.
Can I rely on the fiber value from a generic food database?
Generic values are a good starting point, but the best source is the nutrition label on the exact package you bought. Growing conditions, processing, and whether the seed is whole, ground, or hulled can all change the fiber content by several grams per 100g.
Which seeds are best for reaching a high fiber goal?
Chia seeds and flaxseeds are the clear leaders in this group. If you need more fiber without a lot of bulk, psyllium husk is also very high in fiber but is usually considered a supplement rather than a whole food seed. Sunflower and sesame seeds are better known for healthy fats and minerals, though they still contribute useful fiber in normal portions.