Figuring out how much food to make for a party or gathering is a common source of over- or under-cooking — running short is an obvious problem, but making far too much wastes money and leaves you with more leftovers than you want. This calculator applies standard catering-guide ounces-per-person rates to your guest count, meal type, and appetite level so you get a total weight and category breakdown instead of a single guessed number.
How the total is calculated
Each meal type has a standard per-person serving rate drawn from common catering guidance: about 10 oz per person for an appetizer or cocktail party, 16 oz for a buffet meal, 14 oz for a sit-down meal, and 12 oz for a potluck. That base rate is multiplied by an appetite factor — Light 0.8×, Average 1.0×, Hearty 1.25× — and then by the guest count, before converting from ounces to pounds. The result is an estimated total weight of food to prepare across every course.
Meal type matters more than you'd expect
A buffet meal typically needs more food per person than a sit-down meal, because self-serve settings lead guests to take slightly more than they finish, and buffets are often designed to look generously full throughout the event. A cocktail party or appetizer-only gathering uses a lower base rate per person, but that food is usually split across many more individual pieces — 6-8 appetizer pieces per guest is a common target when apps are the whole meal rather than a starter.
Using the category breakdown and adjusting for your crowd
The protein/sides/appetizers breakdown is an estimate, not a precise recipe — actual dishes vary, and desserts, bread, and drinks aren't broken out separately here. These figures also don't build in a leftovers buffer: if you want extra for seconds or an unexpected guest, add roughly 10-15% to the total separately. Consider treating children as a smaller group at the Light appetite setting if kids make up a meaningful share of your guest count, since they typically eat less than the Average adult baseline.