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Party Supplies Calculator

Turn a guest count into a shopping list: how many plates, cups, napkins and utensils to buy for a snack party, buffet or served meal, plus ice and trash bags — and how many packs that means.

Party
hours
Food
Extras

Results

Supplies for 50 guests165 cups · 83 platesBuffet meal, 4 hours, with 10% extra
Ice50 lb
Trash bags5
Napkins220
Shopping list (packs of 50)
ItemQuantityPacks
Dinner plates832
Dessert plates552
Cups1654
Napkins2205
Forks1383
Knives552
Spoons281

Rules of thumb: plates 1.5 per guest for a buffet meal, cups 1 per guest plus 1 every two hours, ice 1 lb per guest for drinks, and one trash bag per 10 guests.

Hot days, long parties and kids’ parties use more cups and napkins; adjust the buffer or round up.

How it works

  1. Enter the number of guests and how long the party lasts.
  2. Choose the food style and whether you are serving dessert.
  3. Tick coolers if drinks are chilled in ice, and keep the 10% buffer unless you are sure of the count.
  4. Read the shopping list and the packs to buy.

Formula

Plates = guests × (2 snacks · 1.5 buffet · 1 served) + 1 dessert plate each
Cups = guests × (1 + hours ÷ 2)
Napkins = guests × (2 snacks · 3 buffet · 2 served) + 1 with dessert
Ice = 1 lb per guest (2 lb with coolers) · trash bags = guests ÷ 10

Party-planning rules of thumb. Buffets use more plates than served meals because guests go back for seconds with a fresh plate; snack parties use small plates. Cups are replaced as guests set them down, so the count grows with party length. Forks are 1.5 per guest at a buffet, knives 1 per guest for a meal, and dessert adds a fork, plate and napkin each.

Example

A 3-hour graduation party for 120 guests with finger food, a sheet cake and drinks chilled in coolers, buying supplies in packs of 100.

Inputs

Guests
120
Party length
3 hours
Food
Snacks
Serving dessert or cake
Yes
Chilling drinks in coolers
Yes
Add 10% extra
Yes
Items per pack
100

Result

Supplies for 120 guests330 cups · 264 platesSnacks & finger food, 3 hours, with 10% extra
Ice240 lb
Trash bags12
Napkins396
Load this example into the calculator →

Buy a little extra — but not too much

Running out of cups halfway through a party is worse than taking a few home. The 10% buffer covers dropped plates and unexpected guests; beyond that, extra paper goods simply wait for the next party.

Ice is the item most often underestimated. One pound per guest covers drinks; chilling cans and bottles in coolers roughly doubles it, and hot outdoor parties can need more.

Frequently asked questions

How many plates do I need for 100 guests?

For a buffet, about 150 dinner plates plus 100 dessert plates — 165 and 110 with a 10% buffer.

How many cups per guest for a party?

About one cup to start plus one every two hours: three per guest for a four-hour party.

How much ice do I need for a party?

About 1 lb per guest for drinks, or 2 lb per guest if you also chill drinks in coolers.

How many napkins per guest?

Two to three per guest for a meal, plus one more if you serve dessert.