Burger King Whopper Jr.: nutrition and allergens
The Whopper Jr. at Burger King has 340 calories, 19 g fat, 30 g carbohydrate, 15 g protein and 630 mg sodium, according to Burger King’s nutrition information.
Nutrition facts
| Calories | 340 |
|---|---|
| Total fat (g) | 19 24% |
| Saturated fat (g) | 5 25% |
| Trans fat (g) | 0 |
| Cholesterol (mg) | 40 13% |
| Sodium (mg) | 630 27% |
| Total carbohydrate (g) | 30 11% |
| Dietary fiber (g) | 2 7% |
| Total sugars (g) | 7 |
| Protein (g) | 15 30% |
Percentages are the share of the FDA Daily Value for adults and children 4 and over, worked out from Burger King’s published amounts (how % Daily Value works). A dash means Burger King does not publish that value for this item. Not published for this item: added sugars.
Using the FDA’s rule of thumb that 5% of the Daily Value or less per serving is low and 20% or more is high, one serving is high in protein (30%), sodium (27%), saturated fat (25%) and fat (24%). Add it up with other items in the Burger King nutrition calculator.
Allergens
According to Burger King, the Whopper Jr. contains wheat, egg, soy and sesame.
| Milk | Not listed |
|---|---|
| Egg | Contains |
| Fish | Not listed |
| Tree nuts | Not listed |
| Peanuts | Not listed |
| Wheat | Contains |
| Soy | Contains |
| Sesame | Contains |
Burger King's allergen chart marks this item as toasted in a shared toaster.
Allergens from the Burger King allergen chart (June 2025) entry "Whopper Jr. Sandwich".
Burger King says its allergen information is based on suppliers' ingredient lists and that shared cooking and preparation areas and utensils mean any item can come into contact with other allergens. Fish, pork sausage, chicken items, hash browns, mozzarella fries, French toast sticks and onion rings share fryers, and burger buns, sandwich buns and croissants share a toaster; the frying oil is a corn, canola, soy and/or cottonseed blend. The Impossible patty is cooked on the same grill as beef, and Burger King makes no vegan or vegetarian claim for it. Its allergen chart reflects supplier ingredient lists as of June 2025 and may leave out test and limited-time items, and guests with allergies are told to check bk.com before ordering.
Other items in Flame Grilled Burgers at Burger King
By calories, the Whopper Jr. ranks 5 of 34 in Burger King’s Flame Grilled Burgers section, from lowest to highest. The table shows the 9 items nearest to it; each item is compared at its first listed size.
| Item | Calories |
|---|---|
| Hamburger | 260 |
| Kid's Hamburger | 260 |
| Cheeseburger | 300 |
| Kid's Cheeseburger | 300 |
| Whopper Jr. | 340 |
| Rodeo Burger | 340 |
| Bacon Cheeseburger | 350 |
| Whopper Jr. with Bacon | 380 |
| Whopper Jr. with Cheese | 380 |
Nutrition for all 34 items in Flame Grilled Burgers at Burger King
Browse the Burger King menu by goal: high-protein items · low-calorie items
Hamburgers at other chains
Burger King is one of 8 chains on this site that sell hamburgers. Of the 11 at other chains, 9 have fewer calories and 2 have the same or more than the Whopper Jr., comparing each at its first listed size; portions differ, so check the serving on each item’s page.
| Item | Calories |
|---|---|
| Wendy's Jr. Hamburger | 230 |
| Wendy's Kids' Hamburger | 230 |
| McDonald’s Hamburger | 250 |
| Sonic Jr Burger | 270 |
| Whataburger Justaburger | 300 |
| Whataburger Jr. | 310 |
| Dairy Queen HamburgerSingle | 320 |
| Dairy Queen Hamburger (Kids' Meal) | 320 |
Compare all hamburgers side by side (12 items at 8 chains)
Sources
- 1 Burger King, Burger King Nutrition Explorer Covers nutrition and menu · Checked 8 Oct 2026
- 2 Burger King, Burger King Allergen Information (PDF, linked from bk.com) Covers allergens · June 2025 · Checked 8 Oct 2026
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