Sweet potato nutrition facts
Vegetables · Raw · per 100 g
Sweet potato (raw) contains 86 kcal per 100 g, with 1.6 g protein, 20.1 g carbohydrate (of which 4.2 g sugar), 0.1 g fat and 3 g fiber. That works out to about 1.9 g of protein per 100 kcal, and its energy density is low (60–150 kcal/100 g).
Source: USDA FoodData Central. Data as of June 2026.
Nutrition facts per 100 g
| Nutrient | Per 100 g |
|---|---|
| Calories | 86 kcal |
| Protein | 1.6 g |
| Carbohydrate | 20.1 g |
| Fat | 0.1 g |
| Fiber | 3 g |
| Sugar | 4.2 g |
| Potassium | 337 mg |
| Vitamin C | 2.4 mg |
Source: USDA FoodData Central. Data as of June 2026.
What the numbers mean
Energy density tells you how many calories a food packs per gram: sweet potato is low (60–150 kcal/100 g). Protein density — grams of protein per 100 kcal — is a useful way to compare foods regardless of portion size; here it is about 1.9 g/100 kcal. Fiber (3 g per 100 g) supports digestion and satiety, while the sugar figure (4.2 g) is part of total carbohydrate. See our guide on how to read nutrition data for more.
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Frequently asked questions
How many calories are in 100 g of sweet potato?
100 g of sweet potato (raw) contains about 86 kcal, with 1.6 g protein, 20.1 g carbohydrate and 0.1 g fat, per USDA FoodData Central.
How much protein is in sweet potato?
Sweet potato provides 1.6 g of protein per 100 g — roughly 1.9 g of protein per 100 kcal.
Is sweet potato high or low in calories?
At 86 kcal per 100 g, sweet potato has low (60–150 kcal/100 g) energy density.
Source
Data from USDA FoodData Central (FDC ID 168482), per 100 g edible portion. Values are for general information only and are not medical or dietary advice; cooking, brand and variety can change the real figures.
Last updated: 2026-06-14