Where the amounts come from
Iowa State University Extension publishes a chart for a buffet-style graduation party of 50 guests. This calculator divides each line by 50, so it works for any crowd. Its general rule is 1 to 1.5 pounds of food per guest.
Ranges run from low to high, as the source gives them.
How it is calculated
- Per guest = Iowa State's amount for 50 guests ÷ 50.
- Open house: plan for 60% of the people you invite, rounded up.
- Drinks: 2 water and 2 soda per guest for each hour.
Worked example
40 invited to an open house: plan for 24 guests. Sliders: 4.8 to 6 pounds of raw meat. Sides: 6 to 9 pounds each. Appetizers: 96 to 168 bites.