Portion Size Per Guest
Calculator
Results
- Total food needed (g)
- 9,000
- Total food needed (kg)
- 9
Cooking results
| Total food needed (g) | 9,000 |
| Total food needed (kg) | 9 |
formula-map diagram
- Total food needed (g)
- 9,000
- Total food needed (kg)
- 9
Formula breakdown
Formula
total food = portion per guest × number of guests= 9000
Note
Simplified model: results are standard culinary ratios and stated per-kilogram rates. Real ovens, flours, ingredients and food-safety requirements vary, so use a thermometer and your own judgement.
More in Cooking and food
See all →Frequently asked questions
How much does the meal course type affect the recommended portion?+
A protein serving as a stand-alone main course is typically larger (6-8oz cooked) than the same protein served as one of several items in a multi-course or buffet meal (3-4oz), since guests naturally eat less of each individual dish when more options are available.
Why do buffets need a different portion calculation than plated meals?+
Buffets have unpredictable individual consumption and some inevitable over-preparation for visual abundance, so standard guidance adds a buffer (often 10-20% more food than a plated per-person calculation) to avoid running out mid-service.
Does guest demographic change how much I should plan per person?+
Yes meaningfully: a lunch crowd, an evening dinner crowd, a mostly male or athletic group, or an event with heavy drinking will typically eat more than the standard adult portion assumption, so adjust upward for known higher-consumption groups.
Should I plan the same portion size for every dish at a multi-dish meal?+
No, when multiple dishes are served, the assumption is that each guest takes a partial portion of each rather than a full portion of every dish, so multi-dish menus commonly calculate portions per dish based on it being one of several options, not a full stand-alone portion.
How much extra should I plan beyond the calculated total for a group?+
A standard buffer is 10% for a plated meal with a fixed guest count, and higher (15-20%) for events with uncertain attendance or self-serve buffets, since running short is a bigger service failure than having modest leftovers.