Food math is where hosting confidence lives or dies. Too little is a visible failure; too much is a week of leftovers and a grocery bill hangover. Caterers split the difference with a few baseline numbers worth memorizing.
Dinners: the 1.5-pound rule
A full dinner party runs ~1.5 pounds of food per guest, split roughly: 6–8 oz cooked protein, 6–8 oz sides, plus bread and dessert. Two conversions matter: raw meat shrinks ~25% when cooked (buy 10.5 oz raw per 8 oz served), and buffets add ~10% over plated dinners because serving spoons are optimistic.
Appetizers: pieces per hour
| Party length | Pieces per person |
|---|---|
| 2 hours (pre-dinner) | 8–10 |
| 2 hours (dinner is the appetizers) | 12–14 |
| Each extra hour | +4 |
A three-hour cocktail party for 20 lands at ~14–16 pieces each — call it 280 pieces, which is 7 platters of 40. The food quantity calculator handles the counting per event type.
The two-proteins rule (and other abundance tricks)
- Two proteins beat one big protein for parties over 12 — chicken thighs plus sausages reads as abundance and lets guests self-portion.
- Five-plus dishes earn a 10% per-person discount — variety makes guests take smaller portions of everything.
- Stagger the refills: half the food out at hour one, the rest after 90 minutes. Late-arriving platters photograph as generosity; hour-three-empty platters photograph as the end of the party.
- Kids count as half-portions but full guests for ice and soft drinks.
The cheapest abundance
Bread, big salads, and one glossy showpiece — a whole roasted something, a mountain of something green — deliver the most perceived generosity per dollar in all of hospitality. Guests eat with their eyes first; the math just makes sure the plates keep up.