How much protein and fiber are in one medium sweet potato?

Sweet potato, 1 medium (2" dia, 5" long, raw) (114 g), contains about 2.3 g of protein, 3.8 g of fiber and 103 kcal, according to USDA FoodData Central.

At a glance

Protein
2.3 g
Fiber
3.8 g
Calories
103 kcal
Protein per 100 kcal
2.2 g

Portions from USDA FoodData Central

USDA FoodData Central values for Sweet potato. Chosen serving: 1 medium (2" dia, 5" long, raw) (114 g).
Portion Grams Calories Protein Fiber Carbohydrate Fat
Chosen serving: 1 medium (2" dia, 5" long, raw) 114 g 103 kcal 2.3 g 3.8 g 23.6 g 0.2 g
Per 100 g 100 g 90 kcal 2 g 3.3 g 20.7 g 0.2 g
1 small 60 g 54 kcal 1.2 g 2 g 12.4 g 0.1 g
1 large 180 g 162 kcal 3.6 g 5.9 g 37.3 g 0.3 g
1 cup 200 g 180 kcal 4 g 6.6 g 41.4 g 0.3 g

A familiar serving, made clear

One medium sweet potato is easy to picture, and you can log it as a single item.

Where these numbers come from

USDA description: Sweet potato, cooked, baked in skin, flesh, without salt. FDC ID: 168483. Dataset: USDA FoodData Central, SR Legacy, April 2018 release, published 2019-04-01. Food record published 4/1/2019; dataset retrieved 20 September 2026.

Use these values to orient your meal, then make the journal match what was on your plate.

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Written by
Dr. Loredana Gavrilovici, Founder of Food & Fit
Published

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