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Last updated: Aug 9, 2026

Port of Subs

Sourdough

Bread - Small SubsPopular

Port of Subs Sourdough is carb-leaning, with about 84% of macro calories from carb. Each serving has 171 calories, 5.8g protein, 35.7g carbs, and 0.5g fat, making it a lighter restaurant option to compare with larger meals.

3.1 Oz (87.5g)

Serving Size

87.5 g

Serving Weight

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171

Calories

Per serving

5.8 g

Protein

35.7 g

Carbs

0.5 g

Fat

Nutrition Facts

Amount per serving

Calories171 kcal

% Daily Value*

Total Fat 0.5 g1%

Saturated Fat 0.2 g1%

Trans Fat 0 g—

Cholesterol 0 mg0%

Sodium 372 mg16%

Total Carbohydrate 35.7 g13%

Dietary Fiber 1.4 g5%

Total Sugars 0.5 g—

Protein 5.8 g12%

Vitamin A—

Vitamin C—

Vitamin D—

Calcium—

Iron—

Potassium—

Caffeine—

* The % Daily Value tells you how much a nutrient in a serving contributes to a daily diet.

Nutrition Breakdown

171

kcal

Protein5.8 g (14%)

Carbs35.7 g (84%)

Fat0.5 g (3%)

Estimated calorie contribution using 4 kcal/g for protein and carbohydrates and 9 kcal/g for fat.

Meal Planning Insights

Protein density3.4/10

14% of macro calories come from protein.

Satiety index6.2/10

Estimated from protein, fiber, calories, and fat balance.

Activity estimate43 min walk

About 17 minutes of running for these calories.

Key Nutrients

Protein 5.8 g12%

Fiber 1.4 g5%

Sodium 372 mg16%

Sugars 0.5 g—

Saturated Fat 0.2 g1%

How we calculate these values

Diet Compatibility

High protein3.4/10 protein density from 5.8g protein and 171 calories.No

Lower carb35.7g carbs per serving.No

Low fat0.5g total fat per serving.Yes

High sugar0.5g total sugars per serving.No

High sodium372mg sodium per serving.No

Vegetarian source flagNo vegetarian flag is published for this item.Not flagged

Ingredients

Un-Bleached Wheat Flour (Wheat Flour, Malted Barley Flour, Niacin, Iron, Thiamin Mononitrate, Riboflavin, Folic Acid), Water, Sour Sponge In Production, Salt, Arctic (Wheat).

Allergens

Contains

Wheat

Compare with other items

Select up to 3 items to compare calories, protein, sodium, and macros.

Quick comparisons

Sourdough has 4028 fewer calories than 2-Foot Brookie in a Box and 27.5g less protein. Compare

Sourdough has 3028 fewer calories than 2-Foot Brownie in a Box and 17.5g less protein. Compare

2-Foot Brookie in a Box4,199 kcal · 33.2 g protein2-Foot Brownie in a Box3,199 kcal · 23.2 g protein2-Foot Classic Sub Macaroni Salad Center3,815 kcal · 163.6 g protein2-Foot Classic Sub Potato Salad Center3,248 kcal · 158 g protein2-Foot Cookie in a Box3,000 kcal · 30 g protein4x4 Brookie954 kcal · 7.4 g protein

Compare with 2-Foot Brookie in a Box

Sourdough Compared With Nearby Items

Port of Subs Sourdough is listed in the Bread - Small Subs category with 171 calories, 5.8g protein, 35.7g carbs, and 0.5g fat per serving.

Data Source and Methodology

Nutrition values for Sourdough are maintained in Nutrimetry from restaurant-published menu data and were last checked on Aug 9, 2026. Macro percentages use 4 calories per gram for protein and carbohydrates and 9 calories per gram for fat.

Read the data methodology

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