Free cake serving calculator and serving chart

Cake serving chart for wedding and party slices

This is Wilton's chart for the pans the calculator uses. Wedding slices are about 1 x 2 inches and party slices about 1.5 x 2 inches; the counts assume a two-layer cake 4 inches high. Wilton says the numbers are a guide only.

*Wilton lists the 18 inch round only as two half-round pans of a 3 inch high cake, with 110 and 146 as the totals for both halves. The quarter and half sheet names are WebstaurantStore's; some sellers call other sizes a half sheet, so go by the dimensions.

Half sheet and full sheet cake servings

Wilton's chart stops at the 12 x 18 inch pan, 98 wedding slices or 72 party slices, and has no full sheet. WebstaurantStore, a pan seller, cuts sheet cakes into bigger slices of 2 x 3 and 2 x 2 inches, so its counts are lower.

How cake slices are counted

The slice size sets the count: a 1 x 2 inch wedding slice is smaller than a 1.5 x 2 inch party slice, so the same cake gives more of them. Height matters less. Wilton says a cake 3 to 6 inches high serves the same number as a 4 inch one in the same pan because it is cut the same way, while a cake under 3 inches serves half.

The count also depends on who cuts. Wilton's own blog says an 8 inch cake yields 30 to 33 servings when it is cut in rings, against 20 party or 24 wedding slices on its chart. Ask your baker or caterer what slice they cut.

Tiers add up, but sources differ

Wilton's chart gives no totals for tiers, so the calculator adds the pans: a 12, 9 and 6 inch stack at wedding slices is 56 + 32 + 12 = 100. Baker Veena Azmanov gives tier totals as ranges, such as 80 to 90 slices for the same three rounds, which is lower than the sum. If a bakery quotes a number for your design, use theirs.

How the calculator works

Slices needed is the guests times the share who will eat cake, rounded up. The calculator then tries every one-, two- and three-tier cake from the sizes in the chart (or up to three sheets) and picks the one with the fewest slices that still covers your guests. Tiers are different sizes; a tie goes to fewer tiers. Each setting is listed here.

• Guests who will eat cake, 100%. An assumption: every guest gets a slice, so the cake is never short. We have no source for a lower share, so lower it yourself if you know some guests will skip.
• Slice. Wilton's two slice sizes, wedding (about 1 x 2 inches) and party (about 1.5 x 2 inches).
• Kitchen cake. Paperlust describes a kitchen cake as undecorated sheet cakes cut and plated in the kitchen while a small display cake is used for the cutting. The calculator takes the sheet you choose from the slices needed, using Wilton's count for it, and sizes the display cake for the rest.
• Top tier saved. One Wilton wedding cake project leaves the top tier out of its serving count and says it is often saved for the first anniversary. With this ticked, the smallest tier of a two- or three-tier cake does not count toward your guests.
• Cake cutting fee. Paperlust says the venue charges this per slice. We have no source for a typical amount, so the box starts empty. The total is your fee times the slices needed; venues differ on which slices they charge, so ask yours.

The smallest cake for 25 to 300 guests

The calculator's own output at the defaults: every guest eats cake, wedding slices, round tiers. This is an example, not a recommendation for your party.

A kitchen cake shifts the whole table. For 100 guests, a 12 x 18 inch kitchen sheet gives 98 wedding slices and leaves 2 for the display cake, so the smallest cake is the 4 inch round. For 150 guests it leaves 52, and 9 + 6 + 4 inch round covers that with 0 spare. Saving the top tier of a three-tier cake for 100 guests moves the answer to 14 + 8 + 4 inch round, which serves 102 after the 8 saved.

Ask the venue before you order the cake

Ask whether the venue charges a cake cutting fee and how it counts slices, who cuts and plates the cake, and where it can stand until the cutting. Put the slice count and the cake on the banquet event order so the kitchen and the servers read the same numbers.

The free wedding timeline template puts the cake cutting at a time that fits your dinner. For the rest of the food and the bar, the free catering food calculator and the free wedding alcohol calculator use the same guest count.

Sources

We read each of these on October 16, 2026. The serving counts are Wilton's. The Knot's page on the cake cutting fee blocked us that day, so nothing here comes from it.

• Wilton, Cake Baking & Serving Guide. Posted by Wilton October 29, 2025. Read October 16, 2026. Every serving count in the chart and the calculator; wedding slices about 1 x 2 inches, party slices about 1.5 x 2 inches; two-layer cakes 4 inches high; 3 to 6 inches serve the same, under 3 inches half. Wilton says the counts are a guide only.
• Veena Azmanov (baker), Cake Serving Chart Guide. Published February 9, 2013; updated June 30, 2026. Read October 16, 2026. A second chart. Every round, square and sheet figure matches Wilton's except the 6 inch round at wedding slices (hers 14, Wilton's 12); we show Wilton's. Her tier totals are ranges that run lower than a sum of Wilton's figures in two of four cases.
• WebstaurantStore, Sheet Cake Sizes. Last updated September 10, 2025. Read October 16, 2026. Quarter sheet (13 x 9), half sheet (12 x 18) and full sheet (18 x 24) names and sizes, and servings at 2 x 3 and 2 x 2 inch slices. It says pan sizes vary by maker.
• Wilton blog, How to Cut a Round Cake. Posted May 31, 2019. Read October 16, 2026. The ring method for cutting a round cake, and that an 8 inch cake yields 30 to 33 servings cut that way.
• Wilton, Peony Crepe Wedding Cake project. Undated. Read October 16, 2026. Its serving count does not include the top tier, which "is often saved for the first anniversary."
• Paperlust (Amelia Stevens), Sheet Cake vs Tiered Wedding Cake. July 28, 2026. Read October 16, 2026. What a kitchen cake is: undecorated sheet cakes cut and plated in the kitchen while a small display cake is used for the cutting. It calls an 11 x 15 sheet a half sheet, unlike WebstaurantStore, so check the dimensions with your baker.
• Paperlust (Lil van Wyngaard), How Much Does a Wedding Cake Cost?. July 18, 2026. Read October 16, 2026. That the venue, not the bakery, charges a cake cutting fee per slice. We took no dollar figure from it.