Wedding Cake Calculator
Enter your guest count and we’ll recommend a tiered cake that serves everyone — the tier sizes, total servings, and a cost estimate. Free, no signup.
Recommended cake
3-tier
Estimated cost
$354–$708
118 servings
| Tier | Serves |
|---|---|
| 8" round | 24 |
| 10" round | 38 |
| 12" round | 56 |
Serves your 100 guests with 18 slices to spare.
Serving counts use standard 1"×2" wedding slices. Cost is a national estimate; fondant and intricate designs run higher, and your baker's per-serving quote is the final word.
How to size a wedding cake
Wedding cakes are sized by servings, not by how big they look. Bakers cut standard wedding slices at 1 inch by 2 inches, and each round tier yields a known number of those slices. Add the tiers up, match the total to your guest count, and you have your cake.
This tool picks the smallest standard tier stack that serves everyone, then estimates cost from the per-slice price of your chosen icing. For big weddings it will flag when a sheet-cake backup is the smarter, cheaper way to feed the room.
Frequently asked questions
What size wedding cake do I need for 100 guests?
For 100 guests, a three-tier cake of 6", 8" and 10" rounds serves about 74 standard slices, so most couples pair it with a matching sheet cake, or step up to 8", 10" and 12" tiers (about 118 servings). This calculator picks the smallest standard stack that covers your count.
How many servings are in each cake tier?
Using standard 1"×2" wedding slices: a 6" round serves ~12, 8" serves ~24, 10" serves ~38, 12" serves ~56, 14" serves ~78 and 16" serves ~100. Generous "party" slices are larger, so each tier yields roughly 30% fewer.
How much does a wedding cake cost?
Wedding cakes are usually priced per serving. Buttercream typically runs about $3–$6 a slice and fondant $5–$9, so a 100-serving cake lands around $300–$900 depending on style and detail. Your baker’s per-serving quote is the final figure.
What is the sheet-cake hack?
Display a smaller decorated tiered cake for photos and the cutting, then serve guests from a plain matching sheet cake cut in the kitchen. It tastes identical and costs far less per slice, which is handy for larger guest counts.
Should I count every guest for cake?
Not everyone eats cake, but it is safest to plan one slice per guest — leftovers are easy and running out is not. If you are also serving a separate dessert or dessert table, you can size the cake for about 75–80% of guests.
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