The quick answer
Buffet dinner for 100 adults: 48 lb cooked meat (64 lb raw boneless / 100 lb bone-in), 34 lb starch, 34 lb vegetables, 14 lb salad greens, 166 rolls, 111 dessert servings. Plated: 31 lb cooked meat (42 raw), 31 lb starch, 31 lb vegetables, 100 rolls, 100 desserts. Cookout: 166 burgers, 56 hot dogs, 222 buns. Cocktail reception: 1,100 pieces over three hours.
Buffet for 100
| Item | Cooked / served | Buy |
| Meat | 48 lb | 64 lb raw boneless · or 103 lb bone-in |
| Starch | 34 lb | 12 lb dry pasta · or 12 lb dry rice · or 40 lb potatoes |
| Vegetables | 34 lb | ~40 lb raw across 2–3 dishes |
| Salad | 14 lb greens (110 cups) | 14 large clamshells · 1 gallon dressing |
| Rolls + butter | 166 | 14 dozen · 4 lb butter |
| Dessert | 111 servings | 14 round cakes · 16 pies · or 4 full sheet cakes · or 111 cupcakes |
| Drinks (4 hrs, 80% drinking) | 400 alcoholic + 260 soft | 160 beers · 29 bottles wine · 6 bottles liquor · 150 lb ice |
Two proteins? Split the total, don't double it: 100 guests choosing between chicken and beef take about 60% chicken and 60% beef by count (people sample both), so 30 lb cooked of each covers it.
Plated dinner for 100
Plated service removes the buffet's 10% self-serve bump and uses a 5 oz protein portion, because the kitchen controls the plate. That's 31 lb cooked meat, 31 lb starch, 31 lb vegetables, 100 rolls and 100 desserts — about a third less food than the buffet, which is why plated dinners are cheaper in groceries and more expensive in labor. You'll want one server per 20–25 guests for a plated meal versus one per 40–50 for a buffet.
Cookout or picnic for 100
| Burgers (¼ lb) | 166 → 42 lb ground beef |
| Hot dogs | 56 → 7 packs of 8 |
| Buns | 222 (166 + 56) |
| Chicken alternative | Swap 60 burgers for 60 pieces of chicken (30 lb bone-in) |
| Potato salad, pasta salad, beans | 34 lb total ≈ 4 gallons |
| Corn on the cob | 100 ears (1 each) or 60 if there are other vegetables |
| Chips | 13 lb ≈ 13 party bags |
| Watermelon | 8 large (1 per 12) |
| Condiments | 1 gal ketchup · ½ gal mustard · ½ gal mayo · 2 qt pickles · 8 lb tomatoes · 5 lb onions · 6 heads lettuce |
A standard 22-inch kettle grill does about 12 burgers per batch, 8 minutes per batch — 166 burgers is nearly two hours on one grill. Plan three grills, or a rented flat-top, or cook patties ahead and hold them in foil pans with a little beef broth in a 200°F oven.
Cocktail reception for 100
Three hours, no dinner: 11 pieces per person, 1,100 pieces, 6–8 varieties. One-hour cocktail hour before dinner: 6 per person, 600 pieces. Heavy hors d'oeuvres as the meal: 16 per person, 1,600 pieces. A working 1,100-piece menu: 200 meatballs, 150 caprese or antipasto skewers, 150 mini quiches, 150 shrimp, 150 crostini or bruschetta, 100 stuffed mushrooms, 200 cheese/cracker/fruit pairings from a grazing table. Build the grazing table and crudité first — they absorb the crowd while hot items rotate out in batches of 50.
The logistics nobody tells you
- Oven capacity: a home oven holds two full hotel pans. A buffet for 100 needs 8–10 hot pans at once. You need a second kitchen, chafing dishes with fuel (2 cans per dish for 3 hours), or a menu with mostly room-temperature dishes.
- Refrigeration: 64 lb of raw meat plus salads plus drinks doesn't fit in a home fridge. Coolers with ice (1 lb of ice per lb of food, refreshed daily) or a rented reach-in.
- Serving lines: one line feeds about 100 people in 40 minutes; two lines (both sides of one table) in 20. Put drinks and dessert on separate tables away from the line.
- Rentals: 100 dinner plates, forks, knives, glasses, 12 eight-foot tables, 100 chairs, 4 chafing dishes, 2 beverage dispensers. Disposables for 100 run $60–120; rentals $300–600.
- Food safety: hot above 140°F, cold below 40°F, nothing out more than 2 hours (1 hour above 90°F). At 100 people, a probe thermometer and a plan to swap half-pans beats one giant pan going lukewarm.
- Trash: about 1 large bag per 20 guests per hour. Plan for 15–20 bags.
Cost: DIY vs. catering
Groceries for the buffet above typically run $8–15 per person ($800–1,500) depending on protein and region; a cookout closer to $6–10. A drop-off caterer delivers the same buffet for $10–28 per person, full-service buffet $30–70, and a plated wedding dinner $45–100+, before bar, tax and the 18–22% service charge. The catering cost calculator prices your event by style.
Build my list for any number of guests →
Frequently asked questions
How much meat for 100 people?
48 lb cooked for a buffet (64 lb raw boneless, ~100 lb bone-in); 31 lb cooked for plated.
How much pasta for 100 people?
About 12 lb dry as a side, 20–25 lb dry as the main course.
How much rice for 100?
About 12 lb dry (rice triples), or 34 lb cooked.
How many rolls for 100?
About 166 at 1½ each — 14 dozen.
How much cake for 100 people?
111 servings: four full sheet cakes, or a 3-tier wedding cake (6-8-10 inch tiers ≈ 70–80 slices) plus a sheet cake in the back.
How many appetizers for 100 guests?
1,100 pieces for a 3-hour reception; 600 for a cocktail hour before dinner.