The healthiest fast food burger at a national chain is Freddy’s Single Steakburger, coming in at 380 calories with 24 grams of protein and only 12 grams of fat. But “healthiest” depends on what you’re optimizing for: lowest calories, most protein, best ingredients, or fewest carbs. Here’s how the best options stack up across every category.
Best Overall: Freddy’s Single Steakburger
Freddy’s Single Steakburger hits a sweet spot that’s hard to beat. At 380 calories, 24 grams of protein, and 12 grams of fat, it delivers a solid amount of protein without the calorie load of most competitors. For context, a standard Whopper runs over 650 calories, and a Big Mac sits around 550. Freddy’s gets you a real beef patty on a bun for roughly two-thirds the calories of those iconic options, with comparable protein.
Lowest Calorie Options
If you’re counting calories above all else, Wendy’s Jr. Cheeseburger is the lightest pick at just 280 calories. You do sacrifice protein (only 14 grams), so it may not keep you full for long. The In-N-Out Hamburger with no spread comes in at 310 calories for the full meal and offers a more substantial patty.
Other strong low-calorie choices include the McDonald’s McDouble at 390 calories with 22 grams of protein, and the Wendy’s Double Stack at 400 calories with 23 grams of protein. Both give you two patties while staying under 400 calories, which makes them surprisingly efficient if you want to feel like you actually ate a burger.
Best Protein Per Calorie
Protein keeps you full longer and supports muscle maintenance, so the ratio of protein to total calories matters more than protein alone. Shake Shack dominates this category. Their Double Hamburger packs 44 grams of protein into 560 calories, meaning about 24% of its calories come from protein. Freddy’s Double Steakburger without cheese is close behind at 570 calories and 43 grams of protein.
If you want a single-patty option, Freddy’s Single Steakburger still performs well with its 24 grams of protein at 380 calories. The Burger King Double Cheeseburger is another solid pick: 26 grams of protein at 433 calories. As a general rule, ordering doubles without cheese often gives you the best protein-to-calorie trade-off, since the second patty adds protein and relatively little else compared to cheese, sauces, and oversized buns.
Best Low-Carb Burger
In-N-Out’s “Protein Style” option wraps any burger in lettuce instead of a bun, and it makes a real difference. The Double-Double Protein Style has just 12 grams of carbs, 30 grams of protein, and 450 calories. That’s two beef patties and two slices of cheese with almost no bread-based carbs. Carl’s Jr. offers a similar lettuce-wrapped Thickburger at around 430 calories.
Most standard fast food buns add 25 to 45 grams of carbs on their own, so going bunless cuts a significant portion of the total calorie count and nearly all the refined carbohydrates.
Best Ingredient Quality
Standard fast food beef comes from conventionally raised cattle fed grain in feedlots. If sourcing matters to you, a handful of chains do things differently. BurgerFi uses grass-fed beef (though the cattle are finished on corn), and their burger clocks in at 655 calories with an impressive 41 grams of protein. Bareburger goes further with organic, grass-fed beef from a Vermont farm, raised without antibiotics or hormones.
Several smaller chains are even more committed. Elevation Burger and Burger Boss both use 100% grass-fed, grass-finished beef. Farm Burger insists its cattle eat grass exclusively, with no grain at any point. B.Good serves grass-fed beef sourced locally. These are regional chains, so availability varies, but they’re worth seeking out if ingredient transparency is your priority.
Grass-fed beef tends to be leaner and contains a somewhat different fat profile than grain-fed, with more omega-3 fatty acids. Whether that makes a meaningful health difference in a single burger is debatable, but avoiding antibiotics and hormones in meat production is a straightforward win.
Plant-Based Burgers
Burger King’s Impossible Whopper is the most widely available plant-based fast food burger, but it’s not automatically healthier than beef. At 630 calories, 34 grams of fat, and 58 grams of carbs, it’s a heavier meal than many beef options on this list. It does provide 25 grams of protein and 4 grams of fiber, which beef burgers lack.
The biggest nutritional concern with plant-based patties has been saturated fat (from coconut oil) and sodium. Beyond Meat recently reformulated its patty, dropping saturated fat to 2 grams and sodium to 310 milligrams by switching to avocado oil. A large study of plant-based meats found that saturated fat levels average about 2 grams per serving across the category, well below typical beef patties. Still, sodium hovers around a quarter of the American Heart Association’s recommended daily limit of 1,500 milligrams in a single patty. If you’re watching sodium, plant-based burgers aren’t necessarily your friend.
For the lowest-calorie plant-based option, White Castle’s Veggie Slider is just 190 calories, though it only provides 5 grams of protein.
Best Picks at Major Chains
Not everyone lives near a Freddy’s or Shake Shack. Here are the healthiest burgers at the chains you’re most likely to encounter:
- McDonald’s: McDouble, 390 calories, 22g protein, 20g fat
- Wendy’s: Double Stack, 400 calories, 23g protein, 23g fat
- Burger King: Double Cheeseburger, 433 calories, 26g protein, 22g fat
- In-N-Out: Double-Double Protein Style, 450 calories, 30g protein, 32g fat (higher fat but very low carb at 12g)
- Jack in the Box: Jumbo Jack, 490 calories, 26g protein, 23g fat
- Whataburger: Double Meat Whataburger Jr., 420 calories, 23g protein, 20g fat
- Five Guys: Little Cheeseburger, 542 calories, 23g protein, 26g fat
Simple Ordering Tricks
You can improve almost any fast food burger with a few easy swaps. Skip the special sauce, which typically adds 50 to 100 calories of mostly fat and sugar. Order mustard or ketchup instead. Ask for no mayo if it comes standard.
Choose a smaller bun size when the option exists. “Junior” or “little” versions at most chains use a smaller bun with the same or similar patty, shaving off calories from refined flour without losing much protein. Adding extra lettuce, tomato, and onion costs nothing at most chains and gives you some fiber and micronutrients that a plain burger lacks.
The biggest calorie traps aren’t the burger itself. A medium order of fries adds 300 to 400 calories, and a regular soda adds another 200 or more. Swapping fries for a side salad and soda for water turns a 900-calorie meal into a 400-calorie one without touching the burger at all.