Party Sums
Free party and wedding calculators with the maths shown: alcohol, drinks, food per person, ice, tent size, dance floor, cake servings, and wedding budget.
Every party question that starts with "how much" or "what size" is arithmetic on the guest count. These tools do that arithmetic the way a caterer, bartender or rental company would, show the rule they used, and give a table you can plan from next time without coming back.
Bar and drinks covers wedding alcohol, party drinks and ice. Food and cake covers portions per person and cake servings. Space and rentals covers tents and dance floors. Budget splits a wedding total by category.
Bar & drinks
How much beer, wine and liquor to buy for a wedding from guest count and reception length, split by what your crowd drinks, with bottles, mixers, ice.
Party drinksDrinks, bottles, cases, mixers and soft drinks for a cocktail party, BBQ, dinner or holiday party, from guest count, hours and the beer-wine-liquor mix.
Ice for a partyHow much ice to buy for a party or wedding: pounds per guest indoors, outdoors or in summer heat, plus ice for chilling drinks, in 7, 10 and 20 lb bags.
Food & cake
How much food for a party or wedding: pounds of protein, sides and salad per guest for a buffet or plated meal, or apps per guest per hour, kids at half.
Cake servings & tiersHow many people a round, square or sheet cake serves at party or wedding slice sizes, from Wilton's chart, and which tiers fit your guest count.
Space & rentals
What size tent you need for a wedding or party from guest count and seating style, plus dance floor, bar, buffet and DJ zones, matched to rental sizes.
Dance floor sizeWhat size dance floor for your guest count, assuming half the room dances at once at 4.5 square feet each, with panel counts and the standard rental sizes.
Budget
Frequently Asked Questions
Where do the numbers come from?
The planning rules caterers, bartenders and rental companies use: two drinks per guest in the first hour and one an hour after, six ounces of protein per plate, a pound of ice per guest, twelve square feet per seated guest, half the room dancing at once, Wilton's cake serving chart and the common wedding budget split. Each page states its rule and shows a table so you can check the result or plan without the calculator.
Are these exact?
They are averages for an average crowd, which is what every planner starts from. A college reunion drinks more than a baby shower, a buffet with three mains needs less of each, and a venue may cap capacity below what the tent maths allows. Round up, because running out is worse than leftovers, and confirm with the professionals you hire.
Do I need an account, and is anything saved?
No account, nothing saved. Every calculation runs in your browser and nothing you type is sent anywhere.