Jr. Double Cheeseburger vs Original SONIC Smasher (Double): Sonic Nutrition Compared
Quick answer: Jr. Double Cheeseburger has 210 fewer calories than Original SONIC Smasher (Double) (390 vs 600). Protein is 14 g higher in Original SONIC Smasher (Double) (35 g vs 21 g). Sodium is 660 mg lower in Jr. Double Cheeseburger (870 mg vs 1530 mg).
Jr. Double Cheeseburger vs Original SONIC Smasher (Double)
One serving each, as Sonic prints it.
The short answer
Jr. Double Cheeseburger has 210 fewer calories than Original SONIC Smasher (Double) (390 vs 600). Protein is 14 g higher in Original SONIC Smasher (Double) (35 g vs 21 g). Sodium is 660 mg lower in Jr. Double Cheeseburger (870 mg vs 1530 mg).
| Nutrient | Jr. Double Cheeseburger | Original SONIC Smasher (Double) |
|---|---|---|
| Calories | 390 | 600higher |
| Total fat | 23 g29% DV | 37 ghigher47% DV |
| Saturated fat | 8 g40% DV | 14 ghigher70% DV |
| Trans fat | 0 g | 1 ghigher |
| Cholesterol | 45 mg15% DV | 100 mghigher33% DV |
| Sodium | 870 mg38% DV | 1530 mghigher67% DV |
| Carbohydrates | 25 g9% DV | 30 ghigher11% DV |
| Fiber | 2 ghigher7% DV | 1 g4% DV |
| Sugars | 6 g | 8 ghigher |
| Protein | 21 g | 35 ghigher |
| Protein per 100 calories | 5.4 g | 5.8 g |
| Share of a 2,000-calorie day | 20% | 30% |
“Higher” marks the larger number only; it is not a judgement. % DV is the FDA Daily Value for a 2,000-calorie diet, shown for nutrients that have one.
Allergens in Sonic's guide
Sonic's allergen guide does not list Jr. Double Cheeseburger or Original SONIC Smasher (Double) as a single item (it lists parts only, or the item is not in it), so we cannot compare allergens here. Check the allergen menu.
This lists what Sonic marks as contained. Cross-contact can happen in the kitchen, so use the allergen menu if you avoid an allergen.
Jr. Double Cheeseburger vs Original SONIC Smasher (Double): Questions
Answers use only the numbers in Sonic's guides.
Which has more calories, Jr. Double Cheeseburger or Original SONIC Smasher (Double)?
Original SONIC Smasher (Double) has more calories: 600 against 390 for Jr. Double Cheeseburger. Figures are from Sonic's nutrition guides.
Which has more protein, Jr. Double Cheeseburger or Original SONIC Smasher (Double)?
Original SONIC Smasher (Double) has more protein: 35 g against 21 g for Jr. Double Cheeseburger.
Which has more sodium, Jr. Double Cheeseburger or Original SONIC Smasher (Double)?
Original SONIC Smasher (Double) has more sodium: 1530 mg against 870 mg for Jr. Double Cheeseburger.
Which has more sugar, Jr. Double Cheeseburger or Original SONIC Smasher (Double)?
Original SONIC Smasher (Double) has more sugar: 8 g against 6 g for Jr. Double Cheeseburger.
Do Jr. Double Cheeseburger and Original SONIC Smasher (Double) contain the same allergens?
Sonic's allergen guide does not list Jr. Double Cheeseburger or Original SONIC Smasher (Double) as a single item (it lists parts only, or the item is not in it), so we cannot compare allergens here. Check the allergen menu.
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Where the Numbers Come From
We are an independent guide, not Sonic or Inspire Brands.
Sources
- Sonic's Fall 2026 nutrition guide: every value for regular menu items.
- Sonic's Fall 2026 allergen guide: the allergens marked for each item.
- Sonic's November 2026 brochure: limited-time items, flagged on the page.
What it does not do
- It adds, multiplies and compares Sonic's numbers. It does not estimate anything.
- It leaves out items that are not in the Fall 2026 guide, and drink add-ins and burger add-ons.
- It does not compare prices, because Sonic publishes none.
- It does not call any item healthier. “Higher” only marks the larger number.
Sonic publishes no menu prices. Prices on Sonic Menu are not Sonic's: where we could, we show a typical pickup price measured by Drive Thru Index across a sample of Sonic restaurant pages (checked November 6, 2026); for a few items we could not measure, a rough estimate of our own. They are not live prices from any single restaurant. Exact menu prices, combo meal promotions, and product availability vary by independent franchise location, drive-in stall vs. drive-thru, and delivery service app markups (DoorDash, Uber Eats, Grubhub).