Lowest-Calorie Jack in the Box Meals (2026): Every Item Ranked

The lowest-calorie item at Jack in the Box (above a few calories) is Caffeine Free Diet Coke, 16 fl oz, at 5 calories. The table below ranks the 30 lowest-calorie items on the US menu, with protein so you can find filling, lighter options. The list includes sides and drinks as well as mains.

Lowest-calorie items at Jack in the Box (US menu)

Ranked from fewest calories upward, with protein, carbs, and fat for each item:

#	Item	Category	Calories	Protein (g)	Carbs (g)	Fat (g)
1	Caffeine Free Diet Coke, 16 fl oz	Beverages	5	0	0	0
2	Coke Zero, 16 fl oz	Beverages	5	0	0	0
3	Coke Zero, 20 fl oz	Beverages	5	0	0	0
4	Dasani Sparkling Seltzer Water, 20 fl oz	Beverages	5	0	0	0
5	Dasani, 30 fl oz	Beverages	5	0	1	0
6	Diet Barqs Root Beer, 30 fl oz	Beverages	5	0	0	0
7	Gold Peak Classic Blend Iced Tea, 16 fl oz	Beverages	5	0	1	0
8	Gold Peak Classic Blend Iced Tea, 20 fl oz	Beverages	5	0	2	0
9	Coffee, Decaf, 12 fl oz	Beverages	5	0	0	0
10	Coffee, Decaf, 16 fl oz	Beverages	5	1	0	0
11	Coffee, Regular, 12 fl oz	Beverages	5	0	0	0
12	Coffee, Regular, 16 fl oz	Beverages	5	1	0	0
13	Diet Coke, 16 fl oz	Beverages	5	0	0	0
14	Caffeine Free Diet Coke, 20 fl oz	Beverages	10	0	0	0
15	Caffeine Free Diet Coke, 30 fl oz	Beverages	10	0	0	0
16	Coke Zero, 30 fl oz	Beverages	10	0	0	0
17	Dasani Sparkling Seltzer Water, 30 fl oz	Beverages	10	0	0	0
18	Dasani Sparkling Seltzer Water, 40 fl oz	Beverages	10	0	0	0
19	Dasani, 40 fl oz	Beverages	10	0	2	0
20	Mello Yello Zero, 30 fl oz	Beverages	10	0	1	0
21	Minute Maid Light Pink Lemonade, 16 fl oz	Beverages	10	0	3	0
22	POWERade Zero, 16 fl oz	Beverages	10	0	1	0
23	POWERade Zero, 20 fl oz	Beverages	10	0	2	0
24	Gold Peak Classic Blend Iced Tea, 30 fl oz	Beverages	10	0	3	0
25	Gold Peak Classic Blend Iced Tea, 40 fl oz	Beverages	10	0	3	0
26	Diet Coke, 20 fl oz	Beverages	10	0	0	0
27	Diet Coke, 30 fl oz	Beverages	10	0	0	0
28	Franks Red Hot Buffalo Dipping Sauce	Toppings & Ingredients	10	0	1	0
29	Coke Zero, 40 fl oz	Beverages	15	0	0	0
30	Fanta Zero, 30 fl oz	Beverages	15	0	1	0

Track restaurant meals with Nutrola

Restaurant portions are easy to underestimate, and the calories add up fast. Nutrola is an AI calorie tracker built on a 1.8M+ RD-verified food and restaurant database, so you can check a menu item before you order. Log a meal by photo or by voice and you will see how it fits into your day.

Source and method

These figures come from Nutrola's 1.8M+ RD-verified food and restaurant database and reflect the US menu of Jack in the Box, so portion sizes and recipes can differ in other countries. Values are per item as served and are indicative, since menus and recipes change over time.

Frequently asked questions

What is the lowest-calorie item at Jack in the Box?

Caffeine Free Diet Coke, 16 fl oz is among the lowest at 5 calories on the US menu.

What can I eat at Jack in the Box on a diet?

Pick from the lowest-calorie items above, favour grilled proteins and salads, and watch dressings, sauces, and sugary drinks, which add calories quickly.

Does Jack in the Box have low-calorie options?

Yes. The ranking above lists 30 items under the chain's lighter end, including sides and drinks alongside mains.

Summary

For a lighter choice at Jack in the Box, start with Caffeine Free Diet Coke, 16 fl oz at 5 calories. Log it in Nutrola to keep the rest of your day on track.