Portion Size Calculator

Last updated: May 2026

How much food do you need per person? Enter your dish type, number of guests, and serving style — get exact quantities to buy and prepare.

Event Details

Dishes You Are Serving

Check all that apply — portions are calculated per dish based on the full menu.

Quantities to Prepare

Standard portions are based on USDA dietary guidelines and catering industry standards. A protein main dish is typically 6–8oz cooked per person for dinner, reduced to 4–5oz for lunch or parties where multiple proteins are served.

Menu adjustment: When multiple dishes are served, individual portions are reduced. A full dinner with protein, starch, and two sides means each dish is portioned smaller than if it were the only item on the table.

The 10% buffer rule: Always prepare 10–15% more than calculated for sit-down dinners, and 20–25% more for buffets where guests serve themselves. This accounts for generous serves and guests who come back for seconds.

⚠️ Portions are estimates based on standard catering guidelines. Actual consumption varies by age, dietary preferences, and event style.