Quick Answer: How many pounds of roast beef per person? Plan about ½ lb of raw boneless roast or ¾ lb of raw bone-in roast per person when it’s the main dish. After cooking, that gives each guest roughly 5 to 6 oz of sliced beef. With plenty of sides, ⅓ lb boneless per person is usually enough. Use the calculator below for your guest count.
Roast Beef Per Person Calculator
Cooked meat estimates allow for cooking shrinkage and, for bone-in roasts, the weight of the bone.
How Many Pounds of Roast Beef Per Person: Chart for 4–25 Guests
| Guests | Boneless, Raw (½ lb each) | Boneless, Cooked | Bone-In, Raw (¾ lb each) |
|---|---|---|---|
| 4 | 2 lbs (0.9 kg) | ~1.4 lbs | 3 lbs (1.4 kg) |
| 6 | 3 lbs (1.4 kg) | ~2.1 lbs | 4.5 lbs (2 kg) |
| 8 | 4 lbs (1.8 kg) | ~2.8 lbs | 6 lbs (2.7 kg) |
| 10 | 5 lbs (2.3 kg) | ~3.5 lbs | 7.5 lbs (3.4 kg) |
| 12 | 6 lbs (2.7 kg) | ~4.2 lbs | 9 lbs (4.1 kg) |
| 15 | 7.5 lbs (3.4 kg) | ~5.3 lbs | 11.25 lbs (5.1 kg) |
| 20 | 10 lbs (4.5 kg) | ~7 lbs | 15 lbs (6.8 kg) |
| 25 | 12.5 lbs (5.7 kg) | ~8.8 lbs | 18.75 lbs (8.5 kg) |
These amounts assume roast beef is the main dish with a few sides. Keep reading for how raw and cooked weights differ, how to adjust by cut, and how much to make for sandwiches.
Raw vs Cooked Roast Beef Per Person
Per-person guidelines always use raw weight because that's how roasts are sold. A boneless roast loses roughly 25 to 30 percent of its weight in the oven, so ½ lb raw ends up as about 5 to 6 oz of sliced beef on the plate. A bone-in roast also carries the weight of the bone, which is why it needs ¾ lb raw to give the same portion. Roasts cooked to well done lose more moisture than those pulled at medium-rare, so the shrinkage climbs the longer they cook. For a full breakdown by cooking method, see our guide to beef raw vs cooked weight.
How Much Roast Beef Per Person by Cut
| Cut | Raw Per Person (Main Dish) | Why |
|---|---|---|
| Top round, bottom round, sirloin tip, eye of round | ½ lb | Lean and boneless, little waste |
| Chuck roast (pot roast) | ½ lb, up to ¾ lb | Shrinks more as fat and collagen render |
| Beef tenderloin | ½ lb trimmed | Very lean, almost no waste once trimmed |
| Prime rib, bone-in | 1 lb | Bones and fat cap add weight |
Each cut has its own quirks, so we've covered the popular ones in detail: how much prime rib per person, how much chuck roast per person, and beef tenderloin per person.
Roast Beef Per Person for Sandwiches
For sandwiches, plan about 3 to 4 oz of cooked, sliced roast beef per sandwich, or 2 to 3 oz for smaller party sliders. One pound of cooked roast beef makes roughly 4 to 5 sandwiches, and one pound of raw boneless roast makes about 3 to 4 once it's cooked and sliced. If most guests will have one and a half sandwiches each, multiply your guest count by 1.5 before working out the weight.
Adjusting for Your Menu
Sides change the math more than anything else. On a full holiday dinner table with several filling dishes, ⅓ lb of raw boneless roast per person is usually plenty. If roast beef is the star with just one or two sides, use the full ½ lb, and go up to ¾ lb if you want leftovers. Gravy also stretches a roast, since sliced beef served with sauce feels more filling, and our guide to how much gravy per person helps you make enough to go around.
Roast Beef Nutrition Per Serving
A 3 oz serving of lean roast beef, such as top round or eye of round, has roughly 150 to 180 calories and 24 to 26g of protein, with only a few grams of fat. Fattier cuts like chuck or prime rib are higher in calories and fat. Trimming visible fat before eating and keeping slices to about 3 to 4 oz is an easy way to fit roast beef into a balanced meal.
Frequently Asked Questions
About ½ lb of raw boneless roast or ¾ lb of raw bone-in roast per person as a main dish. With many sides, ⅓ lb boneless per person is usually enough.
About 5 to 6 oz of cooked, sliced beef per person, which comes from roughly ½ lb of raw boneless roast.
About 10 lbs of raw boneless roast or 15 lbs of raw bone-in roast for 20 people as a main dish.
About 3 to 4 oz of cooked, sliced roast beef per sandwich, or 2 to 3 oz for smaller sliders.
A boneless roast typically loses about 25 to 30 percent of its raw weight, and more if cooked well done.
Final Answer: How Many Pounds of Roast Beef Per Person
Plan ½ lb of raw boneless roast beef or ¾ lb of raw bone-in roast per person, which cooks down to about 5 to 6 oz of sliced beef each. Drop to ⅓ lb boneless on a crowded menu, and go up to ¾ lb boneless if you want leftovers for sandwiches. Since roasts shrink more the longer they cook, buy by raw weight and round up to the nearest roast size at the store.
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