How are the per-person quantities calculated?

The calculator uses standard catering guidelines as a baseline (e.g., 6 oz of main protein per person for dinner) and then adjusts by your chosen appetite multiplier (0.8x for Light, 1.0x for Average, 1.2x for Hearty) and meal type. Buffet adds an additional 20% to all categories since guests tend to take more when serving themselves.

What does the Buffet adjustment do?

Buffet-style service typically results in 15-25% more food consumption because guests serve themselves multiple times. This calculator applies a 20% upward adjustment to all categories when Buffet is selected.

How are cocktail party quantities different?

Cocktail parties focus on bite-sized appetizers rather than full meals. The guideline is 5-6 appetizer pieces per person per hour (this calculator uses 5.5 as the midpoint) plus 2-3 alcoholic drinks. Non-alcoholic drinks are calculated at a lower rate since cocktail events are shorter.

What is the recipe scaling factor?

If you enter your original recipe yield and the target yield, the calculator shows a multiplier you can apply to every ingredient. For example, if your recipe makes 4 servings and you need 20, the factor is 5x — multiply every ingredient by 5.

Are these quantities exact?

These are recommended starting points based on widely used catering standards. Actual consumption varies by culture, event duration, time of day, and other dishes served. It is always wise to add 5-10% as a buffer for unexpected guests or second helpings.

Serving Size Calculator

Name: Serving Size Calculator
Availability: InStock
Author: Nham Vu

Enter guests, meal type, and appetite to get per-person and total bulk shopping quantities for protein, sides, drinks, and more.

Event Details

Number of guests

Meal type

Appetite level

Recipe Scaling (optional)

Recipe yield

Target yield

Enter your event details and click Calculate

Shopping quantities will appear here

Shopping List

Category	Per Person	Total for Event

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Summary

Enter guests, meal type, and appetite to get per-person and total bulk shopping quantities for protein, sides, drinks, and more.

How it works

Enter the number of guests attending your event.
Select the meal type: Appetizer, Lunch, Dinner, Buffet, or Cocktail Party.
Choose the expected appetite level: Light, Average, or Hearty.
Optionally enter your recipe yield and desired new yield to see a scaling factor.
Click "Calculate" to see per-person and total bulk quantities for all food categories.

Use cases

Plan how much chicken and sides to buy for a 50-person dinner party.
Estimate beer, wine, and soft drinks for a 100-person cocktail reception.
Scale a buffet menu from 20 servings to 80 for a corporate lunch.
Figure out how many pounds of pasta to cook for a family reunion.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu