Jack in the Box Guide
Low Calorie at Jack in the Box
The lowest-calorie substantial item at Jack in the Box is the Mustard, at 5 calories.
Low Calorie Menu Items
| Item | Calories | Protein |
|---|---|---|
| Mustard | 5 | 0g |
| Gold Peak® Fresh Brewed Iced Tea | 5 | 0g |
| Soy Sauce | 5 | 1g |
| Red Onions | 5 | 0g |
| Diet Coke® | 5 | 0g |
| Fire Roasted Salsa | 10 | 0g |
| Kona Classic® Coffee | 10 | 0g |
| Ketchup | 10 | 0g |
| Kona Classic® Decaf Coffee | 10 | 0g |
| Grilled Onions | 10 | 0g |
| Frank's RedHot Buffalo Dipping Sauce | 10 | 0g |
| Side Salad | 20 | 1g |
| Ketchup | 20 | 0g |
| Pride Margarine Spread | 20 | 0g |
| Low-Fat Balsamic Vinaigrette | 25 | 0g |
Across all 133 menu items we track at Jack in the Box, the median is about 360 calories and 13g of protein — so the low calorie picks above are meaningfully different from a typical order, not just the default menu re-sorted.
Frequently Asked Questions
- What's the best low calorie option at Jack in the Box?
- The lowest-calorie substantial item at Jack in the Box is the Mustard, at 5 calories.
- What else at Jack in the Box fits low calorie?
- The Gold Peak® Fresh Brewed Iced Tea is another strong pick — 5 calories, 0g protein.
Nutrition data verified August 31, 2026.