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Classic Smashed Jack calories & nutrition
The Jack in the Box Classic Smashed Jack has 720 calories, 26 g protein, 46 g carbs and 48 g fat.
Nutrition Facts
* Percent Daily Values are based on a 2,000 calorie diet (FDA). Values from the chain's published nutrition, 2026 menu.
Good for weight loss?
It is a heavy pick: 720 calories is 36% of a 2,000 calorie day. The Sourdough Jack has 690 calories with 33 g of protein.
#28 of 32 Jack in the Box meals by protein per calorie.
Lighter swaps at Jack in the Box
Fewer calories, similar protein
 Sourdough JackBurgers · 227 g | 690 | 33 g | 39 g | 44 g | 1,300 mg |
|---|---|---|---|---|---|
 Jumbo Jack CheeseburgerBurgers · 245 g | 600 | 28 g | 33 g | 40 g | 1,110 mg |
 Jumbo JackBurgers · 223 g | 520 | 23 g | 32 g | 33 g | 700 mg |
More protein for about the same calories
 Sourdough Breakfast SandwichAll Day Breakfast · 152 g | 810 | 40 g | 50 g | 51 g | 1,630 mg |
|---|---|---|---|---|---|
 Supreme CroissantAll Day Breakfast · 148 g | 790 | 39 g | 48 g | 50 g | 1,500 mg |
 Meat Lovers Breakfast Burrito w/ SalsaAll Day Breakfast · Salsa | 580 | 36 g | 36 g | 34 g | 1,490 mg |
Questions
How many calories are in the Jack in the Box Classic Smashed Jack?
The Jack in the Box Classic Smashed Jack has 720 calories, on the 2026 menu.
How much protein is in the Classic Smashed Jack?
26 g of protein, or 3.6 g for every 100 calories. That ranks #28 of 32 Jack in the Box meals by protein per calorie.
How many carbs and how much fat are in the Classic Smashed Jack?
46 g of carbs (2 g fiber, 7 g sugar) and 48 g of fat.
How much sodium is in the Classic Smashed Jack?
1,380 mg, 60% of the 2,300 mg daily limit in the Dietary Guidelines for Americans.
Is the Jack in the Box Classic Smashed Jack good for weight loss?
It is a heavy pick: 720 calories is 36% of a 2,000 calorie day. The Sourdough Jack has 690 calories with 33 g of protein.
Eat at Jack in the Box. Still lose weight.
At Jack in the Box, the Southwest Chicken Salad w/ Grilled Chicken is 280 calories and the Bacon Ultimate Cheeseburger is 930. MenuTrim builds your personal plan and shows which one fits today.
- Daily calories for your goalFrom your weight, goal weight and pace.
- A protein target and a per-meal limitSo one meal out doesn't take the whole day.
- The date you'll reach your goalAn estimate from your pace, updated as you log.
- Jack in the Box orders that fit, marked15,000+ dishes at 50 chains, all from 2026 menus.
Build your plan in the app.Nutrition from Jack in the Box's published information for the 2026 menu. Recipes change; check with the restaurant if it matters. MenuTrim is not affiliated with Jack in the Box.