What kind of party are you hosting?
2 vegetarian guests — ensure extra side portions and a plant-based protein option
Plan for 1 to 1.5 pounds of total food per adult guest for a meal-style event. This breaks down to about 0.5 lb of protein, 0.75 lb of sides (across 3 side dishes), and 6-8 appetizer pieces per hour. Children typically eat half the adult portion.
For appetizers served before a main meal, plan 6-8 pieces per person per hour. For an appetizers-only event with no main course, increase to 12-15 pieces per person for the entire event. Offer at least 3-4 different varieties to give guests options.
BBQ parties require about 50% more protein per person than indoor events because guests tend to eat more outdoors. Plan 0.75 lb of meat per adult, split across your protein choices. Add 3 side dishes at 0.25 lb each, and 1 dessert serving per guest.
Home-prepared party food typically costs $8-15 per person depending on the protein choices and event type. Chicken and hot dogs are the most affordable at $3-5 per lb, while beef and fish run $7-10 per lb. Appetizers average $1.50 per piece and desserts about $3 per serving.
Inputs
Result
A buffet for 20 adults and 5 children with chicken and pulled pork split evenly (6.1 lb each), 3 side dishes at 0.25 lb per person per side (22.5 adult-equivalents), and dessert for all 25 guests. Heavy eaters (20%) get 1.5x the 0.5 lb base protein portion.
Inputs
Result
A 4-hour BBQ with 30 adults and 10 children. BBQ base rate is 0.75 lb protein per adult (heavy eaters at 20% get 1.5x). Total protein is split evenly across burgers, hot dogs, and chicken. Sides at 0.25 lb each for 35 adult-equivalents, plus dessert for all 40 guests.
Protein = Base Rate × Heavy Eater AdjustmentBase rate is 0.5 lb/adult for buffet and sit-down events, or 0.75 lb/adult for BBQ. Heavy eaters (user-defined %) get 1.5x the base. Children get 0.5x the adult portion. Total is split evenly across selected proteins.
Where:
Base Rate= 0.5 lb (buffet/sit-down) or 0.75 lb (BBQ) per adultHeavy Eater %= Percentage of guests who eat 1.5x the normal portionChildren= Eat 0.5x the adult portionAppetizers = Guests × Pieces/Person × HoursFor events with a main course, plan 6-8 pieces per person per hour. For appetizers-only events, plan 12-15 pieces per person total.
Where:
Guests= Total guest count (adults + children)Pieces/Person= 6-8 per hour with a meal, 12-15 total for appetizers-onlyHours= Event duration in hoursSides = 0.25 lb × Guests × Number of SidesEach side dish requires about 0.25 lb per person. Three side dishes means 0.75 lb of sides per person total.
Where:
0.25 lb= Standard side dish portion per personGuests= Total guest count (adjusted for children at 0.5x)Number of Sides= How many different side dishes are being servedRunning out of food at a party is every host's nightmare, but buying too much leads to waste and overspending. The key is calculating portions based on your guest count, event type, and menu selections. A buffet for 20 adults needs very different quantities than a BBQ for 50 or an appetizers-only cocktail hour.
Protein is the most expensive and most important item to get right. The standard rule is 0.5 lb per adult for indoor events and 0.75 lb for outdoor BBQs. When offering multiple proteins, divide the total evenly across your selections. Heavy eaters (typically 15-20% of any group) need about 50% more than the standard portion.
Don't forget to account for children, who eat roughly half of adult portions, and dietary restrictions. Vegetarian and vegan guests still need the same total food weight, just in plant-based sides and proteins. This calculator handles all these adjustments automatically and generates a shopping list with exact quantities and estimated costs.
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Last Updated: Mar 9, 2026
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