Quick answer: arbys nutrition starts with the Classic Roast Beef as the baseline — sliced roast beef on a toasted sesame bun at 360 calories. The Beef ‘n Cheddar Classic adds cheese sauce and a different bun (an onion bun with Red Ranch) and lands at 450, the Half Pound Roast Beef doubles the meat and lands at 610, and the curly fries and shake are where a light order quietly stops being light: medium curly fries add 410 and a medium Jamocha Shake adds 700.
Every number in this article comes from Arby’s own nutrition information — the company’s official U.S. Nutrition and Allergen Guide (October 2026), linked from the nutrition page at arbys.com. Where the guide lists sizes, this article keeps them exactly as listed, and Arby’s own note applies throughout: menu items may not be available at every restaurant, and the curly and crinkle fries are individually portioned, so portions can vary slightly from one restaurant to another.
That official framing matters because Arby’s is a different animal from the burger chains. Its flagship is not fried and not stacked with cheese by default, so the sandwich column starts lower than most drive-thru menus. What you stack on top of it is what decides the meal.
The Sandwich Table
These are the official calories for Arby’s slow-roasted beef sandwiches, exactly as listed in the guide:
| Sandwich | Calories |
|---|---|
| Classic Roast Beef | 360 |
| Classic Beef ‘n Cheddar | 450 |
| Double Roast Beef | 510 |
| Classic French Dip & Swiss | 530 |
| Half Pound Roast Beef | 610 |
| Double Beef ‘n Cheddar | 630 |
| Half Pound Beef ‘n Cheddar | 740 |
Read the table as a ladder, because that is how the menu is built. The Classic Roast Beef is the base at 360. The Beef ‘n Cheddar keeps the roast beef and adds cheddar cheese sauce and Red Ranch on an onion bun instead of the sesame bun, which costs 90 more and lands at 450. Doubling the beef on the plain sandwich takes it to 510, and the Half Pound — a half pound of roast beef — lands at 610. Stack both upgrades at once and the Half Pound Beef ‘n Cheddar tops the table at 740, more than double the sandwich it started from.
One number deserves respect: protein. The Classic carries 23 g of protein for its 360 calories, and the Half Pound carries 48 g. The roast beef line is one of the few fast-food menus where the calorie-to-protein trade is honestly decent. The catch is sodium, which climbs with the meat: Arby’s lists the Classic at 970 mg and the Half Pound at 2,040 mg, most of a day’s sodium budget in one sandwich. If salt is your watch item, the base sandwich is the friendlier pick.
Sides & Shakes
The sandwich is only half the tray. Here are the official numbers for the sides Arby’s is known for, plus the shake:
| Item | Calories |
|---|---|
| Curly Fries — Small | 250 |
| Curly Fries — Medium | 410 |
| Curly Fries — Large | 550 |
| Curly Fries — XL | 600 |
| Mozzarella Sticks (4) | 440 |
| Mozzarella Sticks (6) | 650 |
| Jamocha Shake — Small | 540 |
| Jamocha Shake — Medium | 700 |
| Jamocha Shake — Large | 980 |
Two things jump out. First, the fries scale hard: a small curly fries at 250 is a reasonable side, but the medium is 410 — more than the Classic Roast Beef itself — and the XL reaches 600. Second, the shake is not a drink, it is a dessert wearing a straw. Even the small Jamocha is 540 calories; the medium is 700 with 97 g of sugar, and the large is 980, within sight of a full meal on its own. The mozzarella sticks sit in between: 440 for the standard four-piece order, 650 for six.
The value menu tells the same story from the other end. Arby’s lists the small curly fries on its value menu too, at the same 250 calories, and its Roast Beef Slider at 180. Small sizes are a real option at Arby’s, not a secret menu — the trap is only that the default combo size is rarely the small one.
Meal Math
Sandwiches are not eaten alone, so here is the arithmetic that matters. The totals below are computed from the official values in the tables above:
The sensible lunch: Classic Roast Beef (360) + small curly fries (250) = 610 calories. A complete fast-food meal with a side, at a number many sit-down lunches would envy.
The full Arby’s experience: Beef ‘n Cheddar Classic (450) + medium curly fries (410) + medium Jamocha Shake (700) = 1,560 calories — more than two and a half times the sensible lunch, and most of a day’s calories for many adults, in one tray.
The lightest honest order: the Classic Roast Beef with water and no sides = 360 calories. No swaps, no special requests — just the baseline sandwich doing its job.
The gap between 610 and 1,560 is not the sandwich. Both meals start from the same roast beef line; the difference is a size upgrade on the fries and a shake instead of a drink. That is the whole lesson of arbys nutrition in one comparison: the chain’s core sandwich is light by fast-food standards, and the add-ons are where the calories actually live. For context across this site’s restaurant guides, Burger King’s chicken sandwiches run 440 to 790 calories — Arby’s roast beef line starts well under that range.
Where the Extra Calories Come From
It helps to price the upgrades one at a time. Cheese sauce and the onion-bun build: plus 90 (Classic 360 to Beef ‘n Cheddar 450). Doubling the beef: plus 150 (to Double Roast Beef 510). The full half pound: plus 250 (to 610). Sauces, by contrast, are cheaper than people fear — Arby’s lists its Arby’s Sauce as adding just 15 calories and the Horsey Sauce at 60 — so the sandwich itself is rarely the problem.
The side swap is where the math turns. Moving from a small curly fries to a medium costs 160 extra calories (250 to 410); moving from water to a medium Jamocha Shake costs 700. A single size choice on the fries is worth more than the entire cheese upgrade on the sandwich, and the shake alone is worth more than any sandwich on the roast beef menu. That ordering of priorities — shake first, fries second, sandwich upgrades last — is the honest way to read the Arby’s menu.
Ordering Lighter at Arby’s
- Keep the Classic until the upgrade is a deliberate choice. The Beef ‘n Cheddar is 90 more; the Half Pound is 250 more. Both are good sandwiches — just know the price before you order.
- Order the fries small on purpose. Small curly fries are 250; the medium is 410. That one word saves 160 calories before the first bite.
- Treat the Jamocha as dessert. If you want one, the small at 540 instead of the medium at 700 saves 160, and sharing one across the table saves the rest.
- Drink water or unsweetened tea. It keeps the sandwich the only event on the tray, instead of adding a second meal in a cup.
- If you genuinely want the big sandwich, have it — with water. A Half Pound Roast Beef at 610 with water is still lighter than a Classic with medium fries and a shake. Spend calories on the food you came for.
Frequently Asked Questions
How many calories in an Arby’s Classic Roast Beef?
360 calories, per Arby’s official nutrition guide, with 23 g of protein and 970 mg of sodium.
How many calories in a Beef ‘n Cheddar?
The Classic Beef ‘n Cheddar is 450 calories. The Double Beef ‘n Cheddar is 630 and the Half Pound Beef ‘n Cheddar is 740.
How many calories in Arby’s curly fries?
250 for a small, 410 for a medium, 550 for a large and 600 for an XL.
What is the lowest-calorie order at Arby’s?
Among full-size sandwiches, the Classic Roast Beef with water and no sides at 360 calories. The value-menu Roast Beef Slider is smaller at 180 if you only want a snack.
How many calories in a Jamocha Shake?
700 for a medium, 540 for a small and 980 for a large. The medium carries 97 g of sugar.
The bottom line: arbys nutrition has a better starting point than most fast-food menus — a 360-calorie flagship sandwich with real protein — and the same trap as everywhere else: sizes and shakes. Order the sandwich you want, keep the fries small, and treat the Jamocha as the dessert it is, and Arby’s fits a calorie budget more easily than almost any drive-thru. All values come from Arby’s official U.S. Nutrition and Allergen Guide (October 2026); the company notes that items and portions can vary by restaurant.
A Note on the Rest of the Menu
The roast beef line is not the whole Arby’s menu, and a couple of other official numbers are worth knowing before you order. Potato Cakes run 370 for three, 490 for four and 620 for five, and Jalapeño Bites run 290 for five and 470 for eight, with the marinara dip adding just 20. None of these change the main story — the sandwich starts light and the sides decide the meal — but they explain why an order that looks small on the tray can still carry a full meal’s calories.
One last practical point: Arby’s own note on the guide says curly and crinkle fries are individually portioned at each restaurant, so a medium can vary a little from the 410 listed here. Treat these numbers as the official planning figures, not a lab measurement of your specific order — the ranking never changes, though: small fries beat medium fries, water beats a shake, and the Classic beats the Half Pound, every time.
