How Much Food Per Person for a Party

The short answer: for a typical dinner, plan on roughly 6-8oz of cooked protein, 4-6oz of a starch or side, 2-3oz of salad, 1-2 pieces of bread, and one dessert portion per adult guest. But the real answer depends on your service style, meal type, and guest list. That is exactly what this guide (and the calculator below) walk through.

Portion sizes by course

Food is one of four quantities on a catering job. The complete catering quantities picture covers the other three, and a cocktail-style event has its own rules in how many appetizers per person.

Service style changes the math

A buffet runs a bit higher than plated portions, because guests serve themselves and there's some natural overage built into that. Family-style lands close to buffet. Cocktail or passed-apps events are the outlier, and they are counted by the piece rather than the pound: five a guest for a cocktail hour before a dinner, twelve for a two-hour reception that is the meal.

Buffet or plated changes more than the buffer. For a corporate crowd, buffet vs. plated for office parties shows what shifts in staffing and timing as well.

Guest count changes your buffer

Caterers typically build in a safety buffer on top of raw portion math, commonly around 15% for events under 200 guests. For larger events, that percentage can shrink a bit (closer to 10-11%) since individual appetite variance averages out more across a bigger crowd. Kids on the guest list also matter: they typically eat around half an adult portion, though every family is different.

A buffer that keeps growing from one job to the next is the habit described in the real cost of over-ordering, and it is where a good chunk of margin quietly goes.

The fastest way to get exact numbers

Rules of thumb get you close, but the real math adds up fast by hand: service style multiplier, meal-type base portions, buffer scaling, and how many kids are coming. That's exactly what the free calculator below does automatically for your specific guest count.