About Party Planning Calculators

Last updated June 9, 2026

“How much do I need for 30 people?” has no exact answer — only rules of thumb. This site treats those rules honestly: every per-guest amount is an editable assumption sitting in plain sight, not a constant buried in code, so the estimate bends to your crowd instead of pretending to be precise.

Planning tools

6 calculators for the food-and-drink math: Party Drink Calculator, Food Per Guest Calculator, Party Ice Calculator, Cake Servings Calculator, Pizza Calculator, and Coffee for a Crowd Calculator.

Rules of thumb you can argue with

Heavier drinkers? Longer party? Kids in the headcount? Change the per-guest figures and watch the totals move. The defaults are standard catering rules of thumb, labeled as such — the point is that you can disagree with them and the calculator follows you instead of fighting you.

Plan generously, serve sensibly

Quantities are planning rules of thumb, not catering or safety guidance — adjust for your guests and follow basic food-safety practices when serving.

Better rules of thumb welcome

If your event proved a default badly wrong, email corrections@partyplanningcalc.com — the assumptions get revisited.