Peanut butter nutrition facts
Nuts & seeds · Smooth (brand-average) · per 100 g
Peanut butter (smooth (brand-average)) contains 588 kcal per 100 g, with 22.5 g protein, 22.3 g carbohydrate (of which 9.2 g sugar), 50.4 g fat and 5 g fiber. That works out to about 3.8 g of protein per 100 kcal, and its energy density is high (over 300 kcal/100 g).
Source: USDA FoodData Central. Data as of June 2026.
Nutrition facts per 100 g
| Nutrient | Per 100 g |
|---|---|
| Calories | 588 kcal |
| Protein | 22.5 g |
| Carbohydrate | 22.3 g |
| Fat | 50.4 g |
| Fiber | 5 g |
| Sugar | 9.2 g |
| Sodium | 459 mg |
| Potassium | 558 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: peanut butter is high (over 300 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 3.8 g/100 kcal. Fiber (5 g per 100 g) supports digestion and satiety, while the sugar figure (9.2 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 peanut butter?
100 g of peanut butter (smooth (brand-average)) contains about 588 kcal, with 22.5 g protein, 22.3 g carbohydrate and 50.4 g fat, per USDA FoodData Central.
How much protein is in peanut butter?
Peanut butter provides 22.5 g of protein per 100 g — roughly 3.8 g of protein per 100 kcal.
Is peanut butter high or low in calories?
At 588 kcal per 100 g, peanut butter has high (over 300 kcal/100 g) energy density.
Source
Data from USDA FoodData Central (FDC ID 172470), 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