Roast beef is what Arby’s is known for, and it comes in more sizes than most people realize: sliders, Classic, Double and Half Pound, with or without cheddar. Here are the calories, protein, saturated fat and sodium for every Arby’s roast beef sandwich, from Arby’s official nutrition guide, so you can see exactly what each size up costs you.
The quick answer: a Classic Roast Beef has 360 calories and 23 grams of protein. The Double has 510 calories and 38 grams, and the Half Pound has 610 calories and 48 grams.
Every Arby’s roast beef sandwich, by calories
| Roast beef sandwich | Calories | Protein | Sat. fat | Sodium | Carbs |
|---|---|---|---|---|---|
| Roast Beef Slider | 180 | 11 g | 3 g | 520 mg | 18 g |
| Arby’s Melt (regional) | 330 | 18 g | 4 g | 940 mg | 39 g |
| Classic Roast Beef | 360 | 23 g | 5 g | 970 mg | 37 g |
| Super Roast Beef (regional) | 440 | 23 g | 6 g | 1,080 mg | 43 g |
| Classic Beef ‘n Cheddar | 450 | 23 g | 6 g | 1,280 mg | 45 g |
| Double Roast Beef | 510 | 38 g | 9 g | 1,610 mg | 38 g |
| Classic French Dip & Swiss/Au Jus | 530 | 34 g | 10 g | 2,540 mg | 50 g |
| Roast Beef Gyro (regional) | 540 | 24 g | 7 g | 1,300 mg | 48 g |
| Half Pound Roast Beef | 610 | 48 g | 12 g | 2,040 mg | 38 g |
| Double Beef ‘n Cheddar | 630 | 39 g | 11 g | 2,100 mg | 48 g |
| Half Pound Beef ‘n Cheddar | 740 | 49 g | 14 g | 2,530 mg | 48 g |
The Roast Beef Slider is the smallest at 180 calories. Among full-size sandwiches, the regional Arby’s Melt (330) and the Classic Roast Beef (360) are lightest. The Half Pound Beef ‘n Cheddar tops the list at 740 calories and 2,530 mg of sodium.
Items marked “regional” are only sold at some Arby’s locations.
Where these numbers come from
All numbers come from Arby’s official nutrition and allergen information for the US menu, also on our Arby’s nutrition page. Each sandwich is counted as Arby’s makes it, without extra sauce. See our editorial policy for how we check numbers.
Classic vs Double vs Half Pound
Here’s what happens as you size up:
| Sandwich | Classic | Double | Half pound |
|---|---|---|---|
| Roast Beef | 360 cal · 23 g protein · 970 mg | 510 cal · 38 g protein · 1,610 mg | 610 cal · 48 g protein · 2,040 mg |
| Beef ‘n Cheddar | 450 cal · 23 g protein · 1,280 mg | 630 cal · 39 g protein · 2,100 mg | 740 cal · 49 g protein · 2,530 mg |
Going from Classic to Double Roast Beef adds 150 calories and 15 grams of protein. Going from Double to Half Pound adds another 100 calories and 10 grams. Because roast beef is lean, each step adds protein faster than it adds calories. Sodium climbs just as fast, though: from 970 mg to 2,040 mg.
Roast Beef or Beef ‘n Cheddar?
The Beef ‘n Cheddar adds cheddar cheese sauce and a different bun. At every size, it costs you more calories and sodium for the same protein:
- Classic: 450 calories against 360 (+90), with the same 23 grams of protein and 310 mg more sodium.
- Double: 630 calories against 510 (+120) and 490 mg more sodium.
- Half Pound: 740 calories against 610 (+130) and 490 mg more sodium.
If you love the cheddar, the Classic Beef ‘n Cheddar (450 calories) is still a reasonable meal. For the leanest choice, order plain roast beef.
Most protein per calorie
If protein is your goal, this ranking shows which sandwich gives the most for its calories.
| Roast beef sandwich | Protein | Calories | Protein per 100 cal |
|---|---|---|---|
| Half Pound Roast Beef | 48 g | 610 | 7.9 g |
| Double Roast Beef | 38 g | 510 | 7.5 g |
| Half Pound Beef ‘n Cheddar | 49 g | 740 | 6.6 g |
| Classic French Dip & Swiss/Au Jus | 34 g | 530 | 6.4 g |
| Classic Roast Beef | 23 g | 360 | 6.4 g |
| Double Beef ‘n Cheddar | 39 g | 630 | 6.2 g |
| Roast Beef Slider | 11 g | 180 | 6.1 g |
| Arby’s Melt (regional) | 18 g | 330 | 5.5 g |
| Super Roast Beef (regional) | 23 g | 440 | 5.2 g |
| Classic Beef ‘n Cheddar | 23 g | 450 | 5.1 g |
| Roast Beef Gyro (regional) | 24 g | 540 | 4.4 g |
The Half Pound Roast Beef wins with 48 grams of protein in 610 calories (7.9 grams per 100 calories), followed by the Double Roast Beef. Want more high-protein picks from other parts of the menu? See our healthiest Arby’s menu items guide.
Arby’s Sauce and Horsey Sauce
Most people add sauce to their roast beef. Here’s what one serving adds:
| Sauce | Calories | Sodium |
|---|---|---|
| Arby’s Sauce | 15 | 180 mg |
| Horsey Sauce | 60 | 150 mg |
Arby’s Sauce is the lighter option (15 calories). Horsey Sauce has 60 calories but slightly less sodium. Two Horsey Sauce packets on a Classic Roast Beef bring it to 480 calories.
Watch the French Dip’s sodium
The Classic French Dip & Swiss with au jus has 530 calories and 34 grams of protein, a good ratio. But it also has 2,540 mg of sodium, more than the 2,300 mg the Dietary Guidelines for Americans suggest for a whole day. Dipping lightly in the au jus is the easiest way to use less.
How to order at Arby’s
- Arby’s app or arbys.com: see calories, customize, and find app-only offers.
- Drive-thru or in store: ask for sauce on the side so you control how much you use.
- Delivery: through Arby’s app and apps like DoorDash and Uber Eats in many areas, usually at higher prices.
- Compare chains: try our calorie finder or browse high-protein picks across restaurants.
Does Arby’s publish allergen information?
Yes. Arby’s lists allergens for every sandwich. Buns contain wheat, and the cheddar sauce contains milk. Kitchens and fryers are shared, so cross-contact is possible. Check the official guide and tell staff about any allergy.
Arby’s roast beef: frequently asked questions
How many calories are in an Arby’s Classic Roast Beef?
360 calories, with 23 grams of protein, 5 grams of saturated fat and 970 mg of sodium, before any sauce.
How many calories are in an Arby’s Beef ‘n Cheddar?
The Classic Beef ‘n Cheddar has 450 calories. The Double has 630 and the Half Pound 740.
How many calories are in an Arby’s Half Pound Roast Beef?
610 calories, with 48 grams of protein and 2,040 mg of sodium. It has the most protein per calorie of any Arby’s roast beef sandwich.
Is Arby’s roast beef healthy?
The roast beef itself is lean. A Classic Roast Beef (360 calories, 23 grams of protein) is one of the lighter fast-food sandwiches. Sodium is the main drawback, especially in the larger sizes.
How many calories are in Arby’s Horsey Sauce?
60 calories and 150 mg of sodium per serving. Arby’s Sauce has 15 calories and 180 mg.
The bottom line
For the leanest Arby’s roast beef in 2026, order the Classic (360 calories). For the most protein per calorie, go Half Pound. Skip the extra cheddar if you’re counting. See the full menu on our Arby’s page.
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