How many calories are in a Jimmy Johns Slim 4?

October 17, 2025 •

2 min read

According to official Jimmy John's nutritional information, a Slim 4 on 8" French bread contains 420 calories, while the low-carb Unwich version drops the calorie count dramatically to just 70 calories. This stark difference highlights how the bread choice is the most significant factor impacting the sandwich's overall nutritional value.

Quick Summary

The calorie count for a Jimmy John's Slim 4 varies based on the bread choice, ranging from 70 to 420 calories. The unadorned sandwich, featuring only turkey and bread, offers a base for various dietary plans, with macronutrients fluctuating considerably depending on the selected bread type.

Key Points

Calorie Range: The Slim 4 calorie count ranges from 70 to 420 calories, with the lowest being the Unwich and the highest being the 8" French bread version.
Bread is the Key: The choice of bread dramatically impacts the total calories and macronutrients, primarily influencing the carbohydrate content.
Unwich for Low-Carb: The Unwich option, a lettuce wrap instead of bread, reduces the calorie count to 70 and is ideal for low-carb diets.
Customization Matters: Adding condiments like mayonnaise can significantly increase calories and fat, while piling on fresh veggies adds volume and nutrients with minimal calories.
Lean Protein Source: With hand-sliced turkey breast as its main filling, the Slim 4 provides a good source of lean protein, especially when eaten as an Unwich.

Calorie Breakdown by Bread Type

To understand the nutritional value of the Slim 4, it is important to look at the different bread options:

8" French Bread

The Slim 4 on 8" French bread contains approximately 420 calories. The majority of these calories come from carbohydrates in the bread, along with protein from the turkey.

Thick-Sliced Wheat Bread

Choosing the Thick-Sliced Wheat bread results in a lower calorie count of around 350. This option also provides more fiber compared to the French bread.

Unwich (Lettuce Wrap)

The Unwich version of the Slim 4, which replaces bread with a lettuce wrap, is a low-calorie, low-carb, and gluten-free choice with just 70 calories. This option focuses on the protein from the turkey with minimal fat and carbohydrates.

Comparison of Slim 4 Bread Options


Bread Type	Calories	Total Fat (g)	Carbs (g)	Protein (g)	Sodium (mg)
8" French Bread	420	3	68	27	1250
Thick-Sliced Wheat	350	6	49	26	980
Unwich (Lettuce Wrap)	70	0.5	2	14	420

Customization and Additional Considerations

The Slim 4 can be customized, and any additions will change its nutritional content.

Condiments: Adding condiments like mayonnaise or Kickin' Ranch dressing increases calories and fat. For instance, a regular portion of Hellmann's mayo adds about 160 calories and 16g of fat. Lower-calorie options include mustard or oil and vinegar.
Cheese: Provolone cheese is not standard on the Slim 4 and will add calories, fat, and sodium if included.
Veggies: Adding fresh vegetables like lettuce, tomato, and cucumber adds fiber, vitamins, and minerals with minimal calories.

How to make the Slim 4 a healthier choice

Tips for a leaner Slim 4:

Choose the Unwich for the lowest calories and carbs.
Avoid high-fat condiments like mayonnaise; use yellow mustard instead.
Add free veggie toppings for more volume and nutrients.
Be mindful of sodium content, especially on French bread. The official Jimmy John's nutrition guide has detailed information.

Conclusion

The calorie count of a Jimmy John's Slim 4 is not fixed and varies depending on the chosen bread and any additions. Options range from the 420-calorie French bread version to the 70-calorie Unwich. By understanding these differences, you can customize your Slim 4 to align with your dietary needs.

Frequently Asked Questions

A Jimmy John's Slim 4 served on the standard 8" French bread contains approximately 420 calories, with the majority derived from the carbohydrates in the bread.

For a low-carb and low-calorie option, the Slim 4 as an Unwich (lettuce wrap) contains only 70 calories.

The Slim 4 on Thick-Sliced Wheat bread has a lower calorie count than the French bread version, clocking in at approximately 350 calories.

Adding Hellmann's mayonnaise to a Slim 4 will increase its calorie count significantly. For example, the Turkey Tom sandwich, which includes mayo, has a higher calorie count than the basic Slim 4 on French bread.

The main difference is the additions. A Slim 4 is just turkey and bread, while the Turkey Tom includes lettuce, tomato, and mayo, resulting in a higher calorie and fat content.

Yes, with 27g of protein in the 8" French bread version and 14g in the Unwich, the Slim 4 provides a substantial amount of lean protein from the turkey breast.

Yes, by ordering the Slim 4 as an Unwich (lettuce wrap), you can get a gluten-free version of the sandwich.

The Slim 4 is a simplified menu item consisting of only hand-sliced turkey breast and your choice of bread or Unwich, with no vegetables or condiments included by default.