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Catering & Party Food Quantity Calculator

Calculate protein, starch, vegetable, and salad quantities for a sit-down or buffet meal, or total appetizer pieces per variety for a cocktail-style party.

When to use this

Use this when ordering or cooking for a sit-down or buffet meal, or when planning total appetizer pieces for a cocktail-style party, to buy or prep the right quantity for your guest count.

How it compares

Unlike a flat “X pounds of food per person” rule, this calculator breaks quantities down by food category for a meal, or by piece-count per appetizer variety for a cocktail party, matching how caterers actually plan and order.

Enter your values below. Calculations run locally as you type.

How it works

For a sit-down or buffet meal, the calculator multiplies your guest count by industry-standard ounces-per-person figures for protein, starch, vegetables, and salad, then converts ounces to pounds.

For a cocktail-style party, it multiplies guest count by pieces-per-person-per-hour and the event duration to get total appetizer pieces needed.

That appetizer total is then divided evenly across however many distinct appetizer varieties you are offering, so you know how many of each dish to prepare.

FAQs

Buffet vs. plated — do portion sizes differ?

Buffets tend to run slightly higher per-person because guests can and do take seconds, and portion control is looser than a plated meal. The default ounces per person here are reasonable for either style but lean toward buffet-safe.

How much extra should I buy as a safety buffer?

A common rule of thumb is to add about 10% extra food beyond the calculated total, to cover larger appetites, unexpected guests, and to avoid running out before the event ends.

How should I plan around dietary restrictions?

Ask guests about dietary restrictions in advance whenever possible. Regardless of what you learn, it is good practice to offer at least one vegetarian and one gluten-free option at any size event.

Worked example

Input

50 guests, buffet meal at 6oz protein / 5oz starch / 4oz vegetables / 3oz salad per person.

Output

Protein: 18.75 lb. Starch: 15.6 lb. Vegetables: 12.5 lb. Salad: 9.4 lb.

Each per-person ounce figure is multiplied by the guest count and converted to pounds (÷16). At 6oz of protein per person, 50 guests need 300oz, or 18.75 lb.

Common pitfalls

  • Not adding a safety buffer — a common rule of thumb is about 10% extra — risks running out before every guest is served.
  • Using plated-meal portion sizes for a buffet (where guests take seconds) can undercount how much food is actually consumed.
  • Skipping dietary planning for vegetarian and gluten-free guests can leave some attendees with nothing to eat, even at a well-quantified event.

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