In-N-Out publishes specific Hamburger variations: with onion, mustard-and-ketchup instead of spread, and Protein Style with onion. Use those complete rows rather than guessing what a removed bun or sauce contributes.
Three builds, three totals
Hamburger with onion is 360 kcal, 16 g protein, 38 g carbs and 670 mg sodium. The mustard-and-ketchup version is 300 kcal with the same listed protein and carbs, at 610 mg sodium. Protein Style is 210 kcal, 12 g protein, 9 g carbs and 390 mg sodium.
The source-defined sauce version is 60 kcal lower than standard. Protein Style is 150 kcal lower, but also lists 4 g less protein. A lettuce-wrap name does not mean all nutrients except carbohydrate stay unchanged.
The portion weight is revealing
The source weights are 209 g, 202 g and 211 g respectively. Protein Style is slightly heavier than standard despite its lower energy. Total mass is therefore not a useful shortcut for either calorie or protein content.
Stay inside the published choices
This is not a calculator for every off-menu combination. No extra patty, cheese, fries, drink or spread packet is inferred. If you choose a different customization, find an exact official entry or keep its nutrition uncertainty visible. The January 2026 U.S. sheet was consulted in October; that retrieval date is not a claim about an individual kitchen’s portions.
| 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 — Hamburger with onion, mustard and ketchup instead of spread | 1 published order, 202 g | 300 | 16 | 38 | 10 | 2 | 610 |
| In-N-Out — Hamburger with onion, Protein Style (lettuce instead of bun) | 1 published order, 211 g | 210 | 12 | 9 | 14 | 2 | 390 |
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.