In-N-Out keto ordering is straightforward: choose a Protein Style burger, then leave fries and shakes out of the meal. The lettuce wrap replaces the bun, but the finished burger still contains carbs. The tradeoff is a smaller meal unless you choose a larger listed burger or count an additional one.
All figures below come from the In-N-Out Burger Nutrition Facts PDF, retrieved October 24, 2026. The document is dated January 2026. Values are as published by the chain for the named builds with onion.
Protein Style burgers, as listed
| Item and serving | Calories | Total carbs | Fiber | Protein |
|---|---|---|---|---|
| Hamburger with onion, Protein Style | 210 | 9g | 2g | 12g |
| Cheeseburger with onion, Protein Style | 280 | 11g | 2g | 16g |
| Double-Double with onion, Protein Style | 460 | 12g | 2g | 30g |
In-N-Out’s nutrition guide describes Protein Style as the bun replaced with lettuce. That’s the useful substitution when you want a bread-free burger.
I would choose the Double-Double when I want the most protein in a single listed Protein Style burger. The Hamburger has fewer carbs, but also less protein. Decide based on the whole meal rather than looking for the smallest carb number in isolation.
For calculated net carbs, subtract the published fiber: Hamburger 9g minus 2g, Cheeseburger 11g minus 2g, and Double-Double 12g minus 2g. These are label calculations for complete burgers. They aren’t standalone meat-and-cheese counts.
The listed Protein Style builds include spread, lettuce and tomato. The guide doesn’t quantify further sauce or secret-menu changes, so use these totals for the burgers as listed.
Keep the sides simple
Fries are the listed side, and their carbs make them a poor fit for these orders. Ordering another Protein Style burger is easier to count when you want more food. Potatoes haven’t learned the lettuce-wrap trick.
A counted drink
| Item and serving | Calories | Total carbs | Fiber | Protein |
|---|---|---|---|---|
| Coffee, 15 oz | 0 | 0g | 0g | 0g |
Coffee is included in the complete orders because In-N-Out’s guide gives it a clear serving and nutrient row. The counts apply to the listed coffee, without an assumed milk or sugar addition. A drink change needs its own serving count.
The bun, fries and shake comparison
| Item and serving | Calories | Total carbs | Fiber | Protein |
|---|---|---|---|---|
| Hamburger with onion, with bun | 360 | 38g | 2g | 16g |
| Cheeseburger with onion, with bun | 430 | 40g | 2g | 20g |
| Double-Double with onion, with bun | 610 | 42g | 2g | 34g |
| French Fries, 1 order | 360 | 49g | 6g | 6g |
| Vanilla Shake, 15 oz | 590 | 66g | 0g | 16g |
| Chocolate Shake, 15 oz | 610 | 74g | 0g | 16g |
These burger rows include the bun. Use the row that matches what you order.
The Vanilla Shake has 66g carbs. Choosing vanilla instead of chocolate doesn’t turn a milkshake into a low-carb accompaniment.
French Fries also add a substantial carb serving to an otherwise lower-carb burger. A Protein Style order with fries and a shake is still a burger with fries and a shake. The lettuce isn’t a cancellation policy.
Complete orders, counted
| Order | Calories | Total carbs | Net carbs | Protein |
|---|---|---|---|---|
| Protein Style Hamburger with onion + Coffee | 210 | 9g | 7g | 12g |
| Protein Style Cheeseburger with onion + Coffee | 280 | 11g | 9g | 16g |
| Protein Style Double-Double with onion + Coffee | 460 | 12g | 10g | 30g |
| 2 Protein Style Hamburgers with onion + Coffee | 420 | 18g | 14g | 24g |
| Comparison: regular Double-Double with onion + Fries + Coffee | 970 | 91g | 83g | 40g |
| Comparison: Protein Style Double-Double with onion + Vanilla Shake | 1050 | 78g | 76g | 46g |
The first four rows use the exact Protein Style burgers, including the two-burger option. Those are lower-carb choices to compare against your own allowance. The last two show the effect of adding common high-carb foods.
Every net total subtracts the fiber published for those exact servings. The two-Hamburger row doubles the full burger, including its vegetables and spread; it isn’t shorthand for adding a bare patty.
How to order
- Name the burger and say Protein Style, with onion.
- Keep the listed build if you want to use the table’s exact figures.
- Choose a single burger or count each complete additional burger.
- Leave fries and shakes out of the low-carb order.
- Check the wrapper and burger before eating, including the onion request.
For more chains, see our keto fast food guide and our comparison of high-protein, low-carb fast food orders.