Home & Life
Event & Party Planning Calculators
Wedding drinks, ice, pizza, cake, tents, seating, timelines and vendor tips. Free calculators with formulas and worked examples.
Drinks
Food
Pizza Order Calculator (Adults and Kids)Enter adults and kids to get the number of pizzas and the cost.Tiered Cake Serving CalculatorEnter your tier sizes and guests to see how many slices the cake serves.Napkin, Plate and Cup Calculator (BBQ and Party)Enter guests and hours to get plates, napkins, cups and cutlery to buy.
Venue
Table and Chair Rental Calculator (Event Layout Planner)Enter guests and layout to get tables, chairs and the venue size you need.Sound System Wattage Calculator (Speaker Power for a Room)Enter the distance, target loudness and speaker sensitivity to get watts needed.Event Tent Size Calculator (Guests and Tables)Enter guests and layout to find the tent size to rent.
Planning
Event Timeline Calculator (Plan Backwards from the Ceremony)Enter the ceremony time and get a full day schedule.Invitation Budget Calculator (Print vs Digital)Enter guests and costs to compare paper and digital invitations.Wedding Vendor Tip Calculator (DJ, Photographer and More)Enter each vendor's fee to see a suggested tip and your total.Thank You Card Time and Cost CalculatorEnter gifts and writing time to plan your thank you cards.
About these calculators
Plan weddings, birthdays and BBQs with real quantities: how much to buy, how much space you need and what it should cost. Quantities are planning estimates, so add a small buffer and check with your caterer or venue.
Each calculator explains its formula, includes a worked example and lists its sources. Read how we check them on our editorial policy page, or browse all calculators.
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Please note: TheCalcTools gives general estimates for information and education. It is not financial, medical, legal or tax advice, and results should be checked before you make a decision. See our disclaimer and about page.