The Short Answer on Cake for 100 People
You need about 110 to 115 slices of cake for 100 guests. That covers the 10 to 15 percent extra that most planners add for uneven cuts and last-minute guests.
That number is for a cake served as the main dessert. If you also have a dessert catering table, you can order less. This guide shows the tier sizes that work and how to count them.
How Many Cake Servings Do You Need for 100 Guests?
Plan for one slice per guest, then add a cushion. Cakes rarely cut perfectly, and a few guests always want a second piece. For 100 guests, that means 110 to 115 servings.
Planners count confirmed guests, not the invite list, and add 10 to 15 percent for cutting variance. Paperlust’s wedding cake serving guide uses that same range.
Why the slice size matters
Not every slice is the same size. A wedding slice is about 1 inch wide and 2 inches deep. A party slice is about 1.5 inches wide and 2 inches deep.
The thinner wedding slice gives you more pieces from the same cake. Wilton’s serving guide lists both counts for every pan size, and it calls the numbers a guide only.
Ask which slice your baker is using
When a baker quotes servings, ask which slice they mean. A cake that serves 100 wedding slices may only serve about 70 party slices.
Guests at a seated dinner with toasts usually get the thin slice. Guests at a birthday party or backyard event often cut bigger pieces. Pick the size that matches your event before you order.
Also check the cake height. Wilton’s counts assume a cake about 3 to 6 inches tall. A shorter cake gives you about half the listed servings, so ask your baker how tall each tier will be.
Which Cake Tier Sizes Serve 100 Guests?
Round tiers serve this many wedding slices, per Wilton: a 6 inch cake serves 12, an 8 inch serves 24, a 10 inch serves 38, and a 12 inch serves 56.
The 8, 10 and 12 inch stack
Add those three tiers and you get 118 slices. That clears the 115 target with room to spare, so it works well for 100 guests.
The 6, 8 and 12 inch stack
This stack gives you 92 slices. That is short on its own. Many couples add a small kitchen cake in the back to cover the gap.
Party slices give you fewer servings
If you cut party-size slices, the same 8, 10 and 12 inch stack serves 88. At that size you need a larger bottom tier or a second cake to reach 100.
A single 16 inch round serves about 100 wedding slices, per the Paperlust chart. It is a tight fit with no buffer, so most hosts pair it with a small extra cake.
How Does a Baltimore Dessert Table Change the Math?
A dessert table means guests split their sweet tooth across many items. Fewer people ask for a full slice, so you need less cake.
Baltimore weddings often have a cookie table too. That is a local tradition, and guests fill a napkin with cookies before they ever reach the cake.
At Evolved Catering Baltimore, we have set up dessert tables for events from 50 guests to 300 guests in Fells Point, Harbor East, Federal Hill and Mount Vernon. Our pastry team bakes mini tarts, macarons, cookies and cake layers the morning of the event. You can see how we build them on our Baltimore dessert catering page.
We also put an allergen card on every dessert table. It lists which items are gluten-free, nut-free or dairy-free, so guests do not have to ask.
Cake is the sweet that gets the photo, so many hosts keep a smaller cake and let the table carry the rest.
When you get a bakery quote, check the slice count against Wilton’s chart before you sign. A quote that counts thin slices can leave you short.
The same kitchen team that runs your dinner can build and stage the dessert spread. That keeps the timeline clean, and the cake arrives fresh and ready to cut.
How Do You Decide How Much Cake to Order?
Start with your confirmed count, add 10 to 15 percent, and pick the slice size. Then check that your tier sizes add up to that number.
Next, look at the rest of your menu. If you serve a plated dessert, a dessert table or late-night sweets, you can order a smaller cake. If cake is the only dessert, order the full count.
Timing matters too. Plan when the cake gets cut so it fits the evening. Our guide on dinner before or after wedding toasts shows how that flows.
The table the cake sits on matters as well. A tall cake needs a sturdy base, a clean linen and room around it. See our tips on tables and linens for a catered dinner.
Think about your crowd as well. A room full of kids and teens will go back for seconds. A formal dinner crowd that already had a full meal may skip dessert altogether. Adjust the cushion up or down to match.
Finally, ask about delivery and cutting. A cake that is sliced in the kitchen and passed on trays moves faster than one cut at the table. It also keeps the dance floor open, which matters at a 100 guest event.
If you are still unsure, send your guest count and event type to your caterer. They can size the cake and the dessert spread together.
Frequently Asked Questions About Cake for 100 Guests
How many people does a 12 inch cake serve?
A 12 inch round serves about 56 wedding slices or 40 party slices, per Wilton’s chart. Taller cakes do not add servings. Only the width does.
Should I order extra cake for 100 guests?
Yes. Add 10 to 15 percent, so plan for 110 to 115 servings. That covers uneven cuts and guests who were not on the final count. If you are hosting in Baltimore with a dessert table, you can trim that number.
Can a sheet cake help me reach 100 servings?
Yes. Many hosts serve a small display cake and cut slices from a kitchen sheet cake in the back. This keeps the cost down. Ask your baker how many servings each pan gives.
Plan Your Dessert Spread With Evolved Catering Baltimore
Tell us your date and guest count, and we will help you size the cake and the dessert table for your Baltimore event.