How much fiber is in a sweet potato?
Sweet potatoes have 3.8 grams of fiber in 1 medium sweet potato, baked (114 grams), according to USDA FoodData Central. That is 14% of the Daily Value, which the FDA's label rules call a good source of fiber. Per 100 grams, sweet potatoes have 3.3 grams of fiber.
3.8gof fiber in 1 medium sweet potato, baked
15% of a 25 gram day
Fiber in sweet potatoes by serving size
| Serving | Weight | Fiber |
|---|---|---|
| 1 small | 60g | 2g |
| 1 medium (2" dia, 5" long, raw) | 114g | 3.8g |
| 1 large | 180g | 5.9g |
| 1 cup | 200g | 6.6g |
| 100 grams | 100g | 3.3g |
How sweet potatoes compare with other vegetables
Sweet potatoes rank 3 of 13 vegetables in this library, by fiber in one serving.
- Green beans4g
- Potato3.8g
- Sweet potato3.8g
- Corn2.5g
- Broccoli2.4g
Each bar is one serving: green beans, 1 cup, cooked; potato, 1 medium potato, baked with skin; sweet potato, 1 medium sweet potato, baked; corn, 1 medium ear, cooked; broccoli, 1 cup, chopped.
Same as a regular potato, per potato
A medium baked sweet potato has 3.8 grams of fiber. A medium baked potato with its skin has 3.8. Per 100 grams the sweet potato is higher, at 3.3 against 2.2.
Make it a meal
A baked sweet potato topped with half a cup of black beans is 11.3 grams of fiber, 45% of a 25 gram day.
More fiber alongside sweet potatoes
- Chickpeas: 12.5 grams in 1 cup, cooked
- Quinoa: 5.2 grams in 1 cup, cooked
- Lentils: 15.6 grams in 1 cup, cooked
Not sure what your daily number should be? The fiber calculator works it out from your age and sex.
Questions about fiber in sweet potatoes
- How much fiber is in a sweet potato?
- Sweet potatoes have 3.8 grams of fiber in 1 medium sweet potato, baked, which weighs 114 grams. The number comes from USDA FoodData Central.
- Are sweet potatoes high in fiber?
- One serving, 1 medium sweet potato, baked, has 3.8 grams. That is 14% of the Daily Value, which the FDA's label rules call a good source of fiber. Sweet potatoes rank 3 of 13 vegetables in this library by fiber per serving.
- How much fiber is in 100 grams of sweet potatoes?
- 3.3 grams of fiber per 100 grams. The largest size USDA lists, 1 cup, weighs 200 grams and has 6.6 grams of fiber.
- How many sweet potatoes would it take to reach 25 grams of fiber?
- About 6.6, at 3.8 grams each. Most people reach 25 grams by mixing several foods across the day.
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Source: USDA FoodData Central, Sweet potato, cooked, baked in skin, flesh, without salt, retrieved October 8, 2026. Label terms follow the FDA's 28 gram Daily Value for fiber.