Sonic Onion Rings: nutrition and allergens
Sonic lists the Onion Rings in 3 sizes, from 440 calories (Small) to 800 calories (Large). The Small has 21 g fat, 55 g carbohydrate, 6 g protein and 430 mg sodium.
Nutrition facts
| Per serving | Small | Medium | Large |
|---|---|---|---|
| Calories | 440 | 580 | 800 |
| Total fat (g) | 21 27% | 29 37% | 39 50% |
| Saturated fat (g) | 3.5 18% | 5 25% | 7 35% |
| Trans fat (g) | 0 | 0 | 0.5 |
| Cholesterol (mg) | 0 0% | 0 0% | 0 0% |
| Sodium (mg) | 430 19% | 570 25% | 790 34% |
| Total carbohydrate (g) | 55 20% | 74 27% | 101 37% |
| Dietary fiber (g) | 3 11% | 4 14% | 5 18% |
| Total sugars (g) | 14 | 19 | 26 |
| Protein (g) | 6 12% | 8 16% | 11 22% |
Percentages are the share of the FDA Daily Value for adults and children 4 and over, worked out from Sonic’s published amounts (how % Daily Value works). A dash means Sonic does not publish that value for this size. 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, the Small size is high in fat (27%) and carbohydrate (20%) and is low in cholesterol. Add it up with other items in the Sonic nutrition calculator.
Allergens
According to Sonic, the Onion Rings contains milk, wheat and gluten. It may also contain egg, fish, crustacean shellfish, tree nuts, peanuts, soy and sesame through shared equipment or preparation.
| Milk | Contains |
|---|---|
| Egg | May contain |
| Fish | May contain |
| Crustacean shellfish | May contain |
| Tree nuts | May contain |
| Peanuts | May contain |
| Wheat | Contains |
| Soy | May contain |
| Sesame | May contain |
| Gluten | Contains |
Fried; the allergen guide flags a risk of cross-contact with all allergens due to the cooking method.
Sonic relies on its suppliers for allergen information and shares cooking and preparation areas, so it says it cannot rule out cross-contact or promise that any item is free of an allergen, and no item is certified gluten-free, vegetarian or vegan. Blended drinks and frozen desserts share tools, fried foods share fryers, and grilled items share the grill. Buns, Texas Toast, eggs, grilled onions and grilled peppers are cooked with a bun oil that contains soy. Some breads come from local bakeries, so ingredients and allergens such as sesame can differ by restaurant. Tell your carhop about any food allergy before ordering. Items marked as fried carry a risk of cross-contact with all allergens.
Other items in Snacks & Sides at Sonic
By calories (Small), the Onion Rings ranks 12 of 12 in Sonic’s Snacks & Sides section, from lowest to highest.
| Item | Calories |
|---|---|
| Corn Dog | 230 |
| Soft Pretzel Twist | 250 |
| TotsSmall | 250 |
| Groovy FriesSmall | 260 |
| Ched 'R' BitesSmall | 280 |
| Cheese TotsSmall | 310 |
| Ched 'R' PeppersSmall (4 pc.) | 330 |
| Cheese Groovy FriesSmall | 330 |
| Chili Cheese TotsSmall | 350 |
| Chili Cheese Groovy FriesSmall | 360 |
| Mozzarella SticksSmall (4 pc.) | 370 |
| Onion RingsSmall | 440 |
Nutrition for all 12 items in Snacks & Sides at Sonic
Browse the Sonic menu by goal: high-protein items · low-calorie items
Onion rings at other chains
Sonic is one of 6 chains on this site that sell onion rings. Of the 5 at other chains, 4 have fewer calories and 1 has the same or more than the Onion Rings (Small), comparing each at its first listed size; portions differ, so check the serving on each item’s page.
| Item | Calories |
|---|---|
| Burger King Onion RingsValue | 170 |
| Dairy Queen Onion RingsRegular | 290 |
| Whataburger Onion RingsMedium | 300 |
| Culver's Onion RingsMedium | 420 |
| Jack in the Box Panko Onion Rings | 440 |
Compare all onion rings side by side (6 items at 6 chains)
Sources
- 1 Sonic, Sonic Nutritional Information brochure (national) Covers nutrition and menu · Summer 2026 · Checked 8 Oct 2026
- 2 Sonic, Sonic Allergen Information guide Covers allergens · National Summer 2026 Allergen Guide · Checked 8 Oct 2026
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