Arby’s Half Pound Roast Beef contains 48 grams of protein per sandwich, per Arby’s official nutrition guide.
If you’re scanning menus for a meaty protein boost, this oversized roast-beef classic delivers. The number that matters most: 48 grams of protein in a single sandwich. Below, you’ll see how that stacks up against smaller sizes, how it fits into daily intake targets, and smart swaps to keep calories or sodium in check without losing the protein punch.
Protein In The Half-Pound Roast Beef At Arby’s: Nutrition Breakdown
The Half-Pound Roast Beef uses the same slow-roasted beef and bun as the smaller versions; you’re just getting a much bigger pile of beef. Arby’s current nutrition sheet lists 610 calories, 30 g fat (12 g saturated), 38 g carbs, 2 g fiber, 5 g sugar, 2,040 mg sodium, and 48 g protein for this sandwich. That protein count sits near the top of typical fast-food sandwiches made without fried chicken or bacon.
How It Compares To Other Roast-Beef Sizes
Here’s a quick side-by-side using Arby’s current numbers. This lands early so you can see where the protein jump happens as the meat portion climbs.
| Item | Calories | Protein (g) |
|---|---|---|
| Classic Roast Beef | 360 | 23 |
| Double Roast Beef | 510 | 38 |
| Half-Pound Roast Beef | 610 | 48 |
Those values come from Arby’s latest nutrition guide (October 2025). If you see small differences on third-party sites, trust the brand’s own sheet, since it updates with recipe or portion tweaks.
Who Benefits From A 48-Gram Sandwich?
Protein needs vary by body size and activity. A basic reference point is the Dietary Reference Intake of 0.8 g per kilogram of body weight per day. That’s the long-standing baseline used for healthy adults. You can read more from the National Institutes of Health’s page on Dietary Reference Intakes.
What 48 Grams Looks Like Against Daily Targets
- 60 kg (132 lb): baseline target ≈ 48 g/day — this sandwich alone meets the day’s baseline.
- 70 kg (154 lb): baseline target ≈ 56 g/day — this sandwich covers most of it in one meal.
- 80 kg (176 lb): baseline target ≈ 64 g/day — this sandwich gets you close with room for yogurt, eggs, or beans later.
Athletes and heavy lifters often aim higher than the baseline. Even then, 48 grams from one stop is handy when you’re short on time and need a solid dose of high-quality protein.
Macros, Sodium, And Trade-Offs
Protein isn’t the only line to read. The Half-Pound Roast Beef sits at 610 calories with 30 g fat. Saturated fat lands at 12 g and sodium at 2,040 mg. Those numbers can matter if you’re tracking heart health or blood pressure. If you want the protein but prefer a smaller calorie or sodium hit, the Double Roast Beef trims both while still delivering 38 g protein. The Classic Roast Beef brings 23 g protein at much lower calories, useful for lighter appetites or a second-meal plan later in the day.
Bun, Beef, And Where The Protein Comes From
The protein load here is almost entirely from the beef. The sesame bun contributes minimal protein. That’s why size differences map so cleanly to the grams listed in the table. Cheese sauces or dairy-based toppings add a gram or two at most; sauces without dairy add flavor but not protein.
Ways To Keep Protein High And Calories Sensible
You can keep the 48 g win while trimming extras that don’t help your goals. Here are simple moves that work at the counter or in the app:
Skip Empty Add-Ons
- Hold calorie-heavy sauces that add taste but no protein. Arby’s Sauce adds ~15 calories with 0 g protein; Horsey Sauce adds ~60 calories with 0 g protein.
- Mind cheese sauce. Cheddar sauce contributes about 50 calories and 1 g protein. If you want more protein per calorie, a slice of deli cheese elsewhere in your day may be a better swap.
Pick Sides That Play Nice With Protein
Fries fill out the tray but push carbs and sodium. If you’re after protein density, consider holding sides or saving them for a day when you’re not already grabbing a 48 g entrée. If you need more volume, opt for unsauced veggies later, a carton of milk, or a cup of Greek yogurt to balance the day’s macros.
Ordering Tips To Hit Your Targets
Goal: High Protein, Moderate Calories
- Choose the Double Roast Beef (38 g) instead of the Half-Pound to shave calories while keeping strong protein.
- Hold sauces with no protein return. Add mustard or a light swipe of a lower-calorie condiment if you miss moisture.
- Drink water or unsweetened tea to keep calories for food.
Goal: All-In Protein
- Stick with the Half-Pound Roast Beef for the full 48 g.
- No fries; pair with a low-calorie drink. Add a protein-rich snack later if your daily target sits well above baseline.
Goal: Lighter Lunch, Still A Protein Bump
- Go with the Classic Roast Beef (23 g).
- Plan a protein snack later: cottage cheese, a shake, or a hard-boiled egg pack.
Reading Labels: Why Protein %DV Often Isn’t Shown
Restaurant and packaged-food labels list protein grams. You may not see a “% Daily Value” next to that line. That’s normal. FDA materials explain that protein %DV appears only when a claim about protein quality or quantity is made and requires a quality score (PDCAAS). For everyday choices, grams per serving is the useful number to track. If you want a clear primer, see the FDA’s short guide on the protein line on the Nutrition Facts label.
Sauces And Add-Ons: Do They Change Protein?
Most don’t. They change calories, fat, and sodium more than protein. Here are common “adds” and what they do to your numbers, straight from the same brand sheet mentioned above.
| Add-On | Added Calories | Added Protein (g) |
|---|---|---|
| Arby’s Sauce | 15 | 0 |
| Horsey Sauce | 60 | 0 |
| Cheddar Cheese Sauce | 50 | 1 |
Simple Math: Turning Grams Into A Plan
Most folks eat protein across two or three meals. If your daily baseline is 56–64 g and you grab the Half-Pound Roast Beef at lunch, you’ve already banked 48 g. That leaves room for eggs or dairy at breakfast and a smaller protein at dinner. If you’re aiming higher because you lift or you’re older and working to maintain muscle, this sandwich can anchor a day that lands in the 90–120 g range, as long as breakfast and dinner carry some protein, too.
Spacing Protein Through The Day
Many coaches like the idea of spreading protein evenly, since muscle protein synthesis responds well to regular “hits.” Practically, that can look like 25–40 g per meal. A 48 g lunch plus two 25–30 g meals keeps you right in that lane without relying on dessert-like shakes.
Sensible Swaps And Menu Tweaks
Trim Sodium While Keeping Protein
- Skip extra sauces that add sodium without protein.
- Hold salty sides. If you want crunch, go with carrots at home or a small bag of baked chips elsewhere.
- Drink plenty of water during the day, especially if you picked the larger size.
Balance The Day Around A Big Sandwich
When lunch brings 610 calories, breakfast and dinner don’t need to be heavy. Pair oatmeal with milk in the morning, then go with a lean protein and vegetables at night. You still finish the day with strong protein and comfortable calories.
Ingredient Notes And Allergens
The roast beef is slow-roasted; the bun contains wheat and may include sesame. The nutrition sheet flags allergens in red and underlines them. If you manage allergens, check the current PDF before ordering, since regional promos or swaps can change the matrix during the year. The brand’s nutrition page links to the latest file.
Quick Answers To Common Protein Questions
Is 48 Grams Considered “High” For One Sandwich?
Yes for fast food, especially without stacked cheeses or bacon. You’d usually need a double-patty burger, a large grilled-chicken entrée, or a protein bowl to match it.
Does Adding Cheese Change Protein Much?
A cheese slice can add a few grams; the cheddar sauce listed above adds just 1 g. If you want more protein per calorie, consider pairing your meal with a high-protein drink or a cup of Greek yogurt later.
What If I Want Most Of My Daily Protein At Lunch?
That’s a workable approach. Just keep breakfast and dinner lighter but still include some protein so you’re not going from a huge lunch to a protein-free evening.
Bottom Line: Counting Protein In This Sandwich
The Half-Pound Roast Beef gives you 48 grams of protein in one order, verified by Arby’s current nutrition sheet. Whether you scale up or down, the roast-beef line stays one of the fastest ways to rack up protein at a drive-through. Use the tables above, pick the size that fits your day, and save sauces for when you truly want them.