A Double-Double with onion and two Hamburgers with onion are distinct orders. The Double-Double lists 610 kcal and 34 g protein. Two standard Hamburgers total 720 kcal and 32 g protein using the restaurant’s per-burger values.
Count the complete order
One Hamburger lists 360 kcal, 16 g protein, 38 g carbs, 16 g fat, 2 g fiber and 670 mg sodium. Two identical portions therefore give 76 g carbs, 32 g fat, 4 g fiber and 1,340 mg sodium alongside their 720 kcal and 32 g protein.
The Double-Double lists 42 g carbs, 34 g fat, 2 g fiber and 1,670 mg sodium. Compared with the pair of Hamburgers, it has 110 fewer kcal and 2 g more protein, but 330 mg more sodium. “One versus two” is not a complete nutritional rule.
Do not erase the serving difference
The source gives 287 g for Double-Double versus 418 g when two 209 g Hamburgers are combined. This is not an equal-mass comparison and the items have different recipes. It answers which actual order you might purchase, not which ingredient is nutritionally superior.
Keep calculations identifiable
The two-Hamburger total is calculated here from two published portions; it is not a named restaurant combination row. Fries, drinks and extra sauce are excluded. Use the exact standard versions in the table, because substituting Protein Style or another sauce changes the inputs.
| Restaurant / exact order | Serving | kcal | Protein (g) | Carbs (g) | Fat (g) | Fiber (g) | Sodium (mg) |
|---|---|---|---|---|---|---|---|
| In-N-Out — Hamburger with onion | 1 published order, 209 g | 360 | 16 | 38 | 16 | 2 | 670 |
| In-N-Out — Double-Double with onion | 1 published order, 287 g | 610 | 34 | 42 | 34 | 2 | 1670 |
Sources and example boundaries
- In-N-Out official U.S. nutrition information
Exact published order values and portion definitions; source edition 2026-01. Retrieved October 4, 2026.
These are specific U.S. source-defined orders, not personalised recommendations or worldwide menus. Published values are estimates of standard portions. Extra items, unrecorded substitutions, prices and allergen safety are not inferred. Source retrieval is October 4, 2026; an older printed edition remains an older edition.