How This Calculation Works
The calculator uses industry-standard catering estimates for per-person consumption rates. Food estimates range from half a pound per person for appetizer-only events to nearly two pounds for a heavy feast. Drink consumption is estimated at 1.5-2 drinks per person per hour, varying by meal type.
Ice is often the most underestimated party supply — you need about 1-1.5 pounds per guest for chilling drinks alone. Seating follows the standard event planning ratio of one table per 8 guests for sit-down events, with matching chair counts.
Common Mistakes to Avoid
- Underestimating drinks. Especially for events over 3 hours, guests drink more than you expect
- Forgetting ice. It's the number one thing party hosts run out of — plan for 1-1.5 pounds per guest
- Ignoring dietary restrictions. Not planning for dietary restrictions — estimate 15-20% vegetarian options
- Perishable imbalance. Over-buying perishable food while under-buying shelf-stable items
Worked Example
Scenario: 20 guests, 4 hours, light buffet.
Step 1: Food: 20 guests x 0.75 lbs = 15 lbs total.
Step 2: Drinks: 20 guests x 2 drinks/hour x 4 hours = 160 drinks. Ice: 20 guests x 1 lb = 20 lbs.
Step 3: Tables: 3 (one per 8 guests). Chairs: 20.